diff --git a/src/services/llm/context_extractors/vector_search_tool.ts b/src/services/llm/context_extractors/vector_search_tool.ts
index 252c83757..03318e3f9 100644
--- a/src/services/llm/context_extractors/vector_search_tool.ts
+++ b/src/services/llm/context_extractors/vector_search_tool.ts
@@ -41,8 +41,13 @@ export interface VectorSearchOptions {
   summarize?: boolean;
 }
 
+// Define a type for the context service
+export interface IVectorContextService {
+  findRelevantNotes?: (query: string, contextNoteId: string | null, options: Record<string, unknown>) => Promise<unknown[]>;
+}
+
 export class VectorSearchTool {
-  private contextService: any = null;
+  private contextService: IVectorContextService | null = null;
   private maxResults: number = 5;
 
   constructor() {
@@ -52,7 +57,7 @@ export class VectorSearchTool {
   /**
    * Set the context service for performing vector searches
    */
-  setContextService(contextService: any): void {
+  setContextService(contextService: IVectorContextService): void {
     this.contextService = contextService;
     log.info('Context service set in VectorSearchTool');
   }
diff --git a/src/services/llm/tools/attribute_manager_tool.ts b/src/services/llm/tools/attribute_manager_tool.ts
index 4739626c1..5618b47ed 100644
--- a/src/services/llm/tools/attribute_manager_tool.ts
+++ b/src/services/llm/tools/attribute_manager_tool.ts
@@ -9,6 +9,12 @@ import log from '../../log.js';
 import becca from '../../../becca/becca.js';
 import attributes from '../../attributes.js';
 
+// Define a custom error type guard
+function isError(error: unknown): error is Error {
+    return error instanceof Error || (typeof error === 'object' &&
+           error !== null && 'message' in error);
+}
+
 /**
  * Definition of the attribute manager tool
  */
@@ -129,9 +135,10 @@ export class AttributeManagerTool implements ToolHandler {
                         attributeValue: value,
                         message: `Added attribute ${attributeName}=${value || ''} to note "${note.title}"`
                     };
-                } catch (error: any) {
-                    log.error(`Error adding attribute: ${error.message || String(error)}`);
-                    return `Error: ${error.message || String(error)}`;
+                } catch (error: unknown) {
+                    const errorMessage = isError(error) ? error.message : String(error);
+                    log.error(`Error adding attribute: ${errorMessage}`);
+                    return `Error: ${errorMessage}`;
                 }
             } else if (action === 'remove') {
                 // Remove an attribute
@@ -179,9 +186,10 @@ export class AttributeManagerTool implements ToolHandler {
                         attributesRemoved: attributesToRemove.length,
                         message: `Removed ${attributesToRemove.length} attribute(s) from note "${note.title}"`
                     };
-                } catch (error: any) {
-                    log.error(`Error removing attribute: ${error.message || String(error)}`);
-                    return `Error: ${error.message || String(error)}`;
+                } catch (error: unknown) {
+                    const errorMessage = isError(error) ? error.message : String(error);
+                    log.error(`Error removing attribute: ${errorMessage}`);
+                    return `Error: ${errorMessage}`;
                 }
             } else if (action === 'update') {
                 // Update an attribute
@@ -233,16 +241,18 @@ export class AttributeManagerTool implements ToolHandler {
                         attributesUpdated: attributesToUpdate.length,
                         message: `Updated ${attributesToUpdate.length} attribute(s) on note "${note.title}"`
                     };
-                } catch (error: any) {
-                    log.error(`Error updating attribute: ${error.message || String(error)}`);
-                    return `Error: ${error.message || String(error)}`;
+                } catch (error: unknown) {
+                    const errorMessage = isError(error) ? error.message : String(error);
+                    log.error(`Error updating attribute: ${errorMessage}`);
+                    return `Error: ${errorMessage}`;
                 }
             } else {
                 return `Error: Unsupported action "${action}". Supported actions are: add, remove, update, list`;
             }
-        } catch (error: any) {
-            log.error(`Error executing manage_attributes tool: ${error.message || String(error)}`);
-            return `Error: ${error.message || String(error)}`;
+        } catch (error: unknown) {
+            const errorMessage = isError(error) ? error.message : String(error);
+            log.error(`Error executing manage_attributes tool: ${errorMessage}`);
+            return `Error: ${errorMessage}`;
         }
     }
 }
diff --git a/src/services/llm/tools/read_note_tool.ts b/src/services/llm/tools/read_note_tool.ts
index a4de7ec3a..d128d550a 100644
--- a/src/services/llm/tools/read_note_tool.ts
+++ b/src/services/llm/tools/read_note_tool.ts
@@ -8,6 +8,25 @@ import type { Tool, ToolHandler } from './tool_interfaces.js';
 import log from '../../log.js';
 import becca from '../../../becca/becca.js';
 
+// Define type for note response
+interface NoteResponse {
+    noteId: string;
+    title: string;
+    type: string;
+    content: string | Buffer;
+    attributes?: Array<{
+        name: string;
+        value: string;
+        type: string;
+    }>;
+}
+
+// Error type guard
+function isError(error: unknown): error is Error {
+    return error instanceof Error || (typeof error === 'object' &&
+           error !== null && 'message' in error);
+}
+
 /**
  * Definition of the read note tool
  */
@@ -66,7 +85,7 @@ export class ReadNoteTool implements ToolHandler {
             log.info(`Retrieved note content in ${duration}ms, content length: ${content?.length || 0} chars`);
 
             // Prepare the response
-            const response: any = {
+            const response: NoteResponse = {
                 noteId: note.noteId,
                 title: note.title,
                 type: note.type,
@@ -77,13 +96,13 @@ export class ReadNoteTool implements ToolHandler {
             if (includeAttributes) {
                 const attributes = note.getOwnedAttributes();
                 log.info(`Including ${attributes.length} attributes in response`);
-                
+
                 response.attributes = attributes.map(attr => ({
                     name: attr.name,
                     value: attr.value,
                     type: attr.type
                 }));
-                
+
                 if (attributes.length > 0) {
                     // Log some example attributes
                     attributes.slice(0, 3).forEach((attr, index) => {
@@ -93,9 +112,10 @@ export class ReadNoteTool implements ToolHandler {
             }
 
             return response;
-        } catch (error: any) {
-            log.error(`Error executing read_note tool: ${error.message || String(error)}`);
-            return `Error: ${error.message || String(error)}`;
+        } catch (error: unknown) {
+            const errorMessage = isError(error) ? error.message : String(error);
+            log.error(`Error executing read_note tool: ${errorMessage}`);
+            return `Error: ${errorMessage}`;
         }
     }
 }
diff --git a/src/services/llm/tools/tool_initializer.ts b/src/services/llm/tools/tool_initializer.ts
index 1d2b7e56a..e8ceca3ee 100644
--- a/src/services/llm/tools/tool_initializer.ts
+++ b/src/services/llm/tools/tool_initializer.ts
@@ -19,6 +19,12 @@ import { CalendarIntegrationTool } from './calendar_integration_tool.js';
 import { NoteSummarizationTool } from './note_summarization_tool.js';
 import log from '../../log.js';
 
+// Error type guard
+function isError(error: unknown): error is Error {
+    return error instanceof Error || (typeof error === 'object' &&
+           error !== null && 'message' in error);
+}
+
 /**
  * Initialize all tools for the LLM
  */
@@ -50,8 +56,9 @@ export async function initializeTools(): Promise<void> {
         const toolCount = toolRegistry.getAllTools().length;
         const toolNames = toolRegistry.getAllTools().map(tool => tool.definition.function.name).join(', ');
         log.info(`Successfully registered ${toolCount} LLM tools: ${toolNames}`);
-    } catch (error: any) {
-        log.error(`Error initializing LLM tools: ${error.message || String(error)}`);
+    } catch (error: unknown) {
+        const errorMessage = isError(error) ? error.message : String(error);
+        log.error(`Error initializing LLM tools: ${errorMessage}`);
         // Don't throw, just log the error to prevent breaking the pipeline
     }
 }