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

With no annotations provided, the description carries the behavioral disclosure burden. It discloses the unknown-slug fallback (returning known slugs instead of guessing), notes that some fields are 'as fetched' from the official page, and mentions 'curated records only' for the Baipiaoji link. This goes beyond a simple 'get by slug' statement, though it does not cover authorization or error behavior.

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

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

The description is a single dense sentence, but it is front-loaded with the core purpose and packs the return fields into a comprehensible semicolon-separated list. Every clause earns its place, though it is slightly long and could be broken into two sentences for readability.

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

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

There is no output schema, so the description compensates by enumerating the complete set of returned fields and specifying edge-case behavior for unknown slugs. Given the tool's low parameter complexity, no annotations, and rich sibling context, an agent has enough information to invoke it correctly.

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

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

Schema description coverage is 100%, so the parameters are already documented: slug accepts a registry slug or exact display name, and lang is an enum defaulting to en. The description adds the unknown-slug behavior, but that is more behavioral context than parameter semantics. It does not materially expand on the schema descriptions.

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

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

The description states a specific verb and resource: 'Return a single agent-watch record by slug' and enumerates exactly what fields are included. It clearly distinguishes itself from sibling tools like search_ai_tools and get_free_tier_limit by focusing on retrieving one record by identifier.

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

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

The description makes the usage context clear: use this when you have a slug or exact display name and need the full tracked record. It does not explicitly name alternatives or state when not to use it, but the by-slug scope is unambiguous.

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