delete_short_term_memories
Remove short-term memories by keyword or regex pattern to manage conversation data and optimize memory usage in the Memory MCP Server.
Instructions
Delete short-term memories matching a keyword or regex pattern.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| pattern | Yes | String keyword or regex pattern to match (e.g., "keyword" or "/pattern/i") | |
| conversation_id | Yes | Conversation ID for storage |
Implementation Reference
- src/tools/short-term-tools.js:121-146 (handler)The primary handler function for the 'delete_short_term_memories' tool. Parses the pattern (supports regex format /pattern/i), delegates deletion to ShortTermMemoryManager.deleteMemories(), persists changes via storage, and returns deletion stats.
handler: async (args) => { try { // Parse regex if pattern is in /.../ format let searchPattern = args.pattern; const regexMatch = args.pattern.match(/^\/(.+)\/([gimsuy]*)$/); if (regexMatch) { searchPattern = new RegExp(regexMatch[1], regexMatch[2]); } const deletedCount = memoryManager.deleteMemories(searchPattern); await storageManager.saveShortTermMemories(memoryManager.getMemories()); return { success: true, deletedCount, remainingCount: memoryManager.getMemories().length, message: `Deleted ${deletedCount} memor${deletedCount === 1 ? 'y' : 'ies'}` }; } catch (error) { return { success: false, error: error.message }; } } - Zod input schema defining the tool parameters: pattern (string for keyword or regex) and conversation_id.
inputSchema: z.object({ pattern: z.string().describe('String keyword or regex pattern to match (e.g., "keyword" or "/pattern/i")'), conversation_id: z.string().describe('Conversation ID for storage') }), - src/memory/short-term.js:596-606 (helper)Core deletion logic in ShortTermMemoryManager: filters memories array by matching pattern against mem.text (regex test or string includes), returns count of deleted items.
deleteMemories(pattern) { const oldLength = this.memories.length; if (pattern instanceof RegExp) { this.memories = this.memories.filter(mem => !pattern.test(mem.text)); } else { this.memories = this.memories.filter(mem => !mem.text.includes(pattern)); } return oldLength - this.memories.length; } - src/index.js:152-154 (registration)Static registration of short-term tools (including delete_short_term_memories) for default conversation_id into the toolRegistry for list_tools.
// 注册所有短期记忆工具 const shortTermTools = createShortTermTools(defaultShortTermManager, defaultStorageManager); shortTermTools.forEach(tool => registerTool(tool, 'short-term')); - src/index.js:285-290 (registration)Dynamic recreation of short-term tools with conversation-specific managers and invocation of the matching tool handler during actual tool call execution.
manager = await getShortTermManager(conversationId); storage = getStorageManager(conversationId); const tools = createShortTermTools(manager, storage, queryCache); const tool = tools.find(t => t.name === toolName); result = await withTimeout(tool.handler(validatedArgs), timeout, `Tool ${toolName} timeout`); } else if (toolScope === 'long-term' || toolName.includes('long_term')) {