Prism MCP

Instructions

Implementation Reference

• src/tools/sessionMemoryHandlers.ts:2027-2047 (handler)

  The handler function knowledgeDownvoteHandler decreases an entry's importance by calling storage.adjustImportance(args.id, -1).

  export async function knowledgeDownvoteHandler(args: unknown) {
    if (!isKnowledgeVoteArgs(args)) {
      throw new Error("Invalid arguments for knowledge_downvote");
    }
  
    const storage = await getStorage();
    try {
      await storage.adjustImportance(args.id, -1, PRISM_USER_ID);
      debugLog(`[knowledge_downvote] Downvoted entry ${args.id}`);
      return {
        content: [{ type: "text", text: `👎 Entry ${args.id} downvoted (-1 importance).` }],
        isError: false,
      };
    } catch (err) {
      const msg = err instanceof Error ? err.message : String(err);
      return {
        content: [{ type: "text", text: `❌ Failed to downvote entry ${args.id}: ${msg}` }],
        isError: true,
      };
    }
  }

• src/tools/sessionMemoryDefinitions.ts:962-970 (schema)

  Tool definition for knowledge_downvote.

  export const KNOWLEDGE_DOWNVOTE_TOOL: Tool = {
    name: "knowledge_downvote",
    description:
      "Downvote a memory entry to decrease its importance. " +
      "Importance cannot go below 0.",
    inputSchema: {
      type: "object",
      properties: {
        id: {

• src/server.ts:812-814 (registration)

  The tool "knowledge_downvote" is registered in the main MCP server's callTool request handler.

  case "knowledge_downvote":
    if (!SESSION_MEMORY_ENABLED) throw new Error("Session memory not configured. Set SUPABASE_URL and SUPABASE_KEY.");
    result = await knowledgeDownvoteHandler(args); break;