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polarity_record_preference

Record user preferences, likes, dislikes, or working-style rules into a persistent knowledge graph for future sessions.

Instructions

Record a stated preference in the user's graph. Convenience wrapper over polarity_observe with kind='preference'. Use when the user expresses a like, dislike, opinion, or working-style rule that should persist across sessions.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
textYes
sourceNo
tagsNo
confidenceNo

Implementation Reference

  • The handler for polarity_record_preference – a convenience wrapper that calls client.observe() with kind='preference'.
    handler: async (input, client) =>
      client.observe({ ...(input as { text: string }), kind: "preference" }),
  • Input schema for polarity_record_preference: text (required), optional source, tags, and confidence.
    inputSchema: z
      .object({
        text: z.string().min(1).max(4000),
        source: z.string().max(64).optional(),
        tags: z.array(z.string().max(32)).max(8).optional(),
        confidence: z.number().min(0).max(1).optional(),
      })
      .strict(),
  • Registration of the polarity_record_preference tool in the TOOLS array, including name, description, inputSchema, and handler.
    {
      name: "polarity_record_preference",
      description:
        "Record a stated preference in the user's graph. Convenience wrapper over polarity_observe with kind='preference'. Use when the user expresses a like, dislike, opinion, or working-style rule that should persist across sessions.",
      inputSchema: z
        .object({
          text: z.string().min(1).max(4000),
          source: z.string().max(64).optional(),
          tags: z.array(z.string().max(32)).max(8).optional(),
          confidence: z.number().min(0).max(1).optional(),
        })
        .strict(),
      handler: async (input, client) =>
        client.observe({ ...(input as { text: string }), kind: "preference" }),
    },
  • CosmosClient.observe() method which the handler delegates to; sends a POST to /api/polarity/observe.
    observe(input: {
      text: string;
      source?: string;
      tags?: string[];
      kind?: "observation" | "event" | "preference";
      confidence?: number;
    }) {
      return this.request<ObserveResponse>({
        method: "POST",
        path: "/api/polarity/observe",
        body: { polarity_user_id: this.config.polarityUserId, ...input },
      });
    }
  • src/server.ts:38-44 (registration)
    Server registration: tools are listed via ListToolsRequestSchema and dispatched via CallToolRequestSchema which calls findTool() and invokes the handler.
    server.setRequestHandler(ListToolsRequestSchema, async () => ({
      tools: TOOLS.map((t) => ({
        name: t.name,
        description: t.description,
        inputSchema: zodToJsonSchema(t.inputSchema),
      })),
    }));
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided, so description carries burden. It explains it's a convenience wrapper over polarity_observe with fixed kind, but does not detail side effects like graph mutation, permissions, or reversibility. Adds context about persistence.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, front-loaded with purpose and then usage guidelines. No unnecessary words, every sentence serves a clear purpose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No output schema; description lacks details on return values or error handling for a persistent mutation tool. However, for a simple recording tool, the core purpose and usage are adequately covered.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, and description does not explain any parameter. Parameter names (text, source, tags, confidence) are somewhat self-explanatory, but description fails to add value beyond the schema's structural information.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Clearly states it records a stated preference in the user's graph, distinguishes from polarity_observe by specifying kind='preference' and persistence across sessions. Provides a specific verb and resource.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly says 'Use when the user expresses a like, dislike, opinion, or working-style rule that should persist across sessions.' This gives clear context for when to use the tool and implies when not (transient observations).

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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