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

The description adds context beyond the readOnlyHint annotation by specifying the catalog contains live, agent-ready data packs and that it is a free discovery operation. It does not contradict the annotation and provides some added behavioral context, though it omits details like rate limits or pagination.

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 concise, with two sentences that are front-loaded ('Free discovery' immediately conveys the tool's nature) and no wasted words. Every word adds value.

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?

Given the tool has no parameters, no output schema, and only a readOnlyHint annotation, the description is nearly complete for its simplicity. It explains what is returned and the platform, though it could potentially clarify the format of the data packs or intended use cases.

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?

The tool has zero parameters, so the schema description coverage is 100%. The description does not need to explain parameter semantics, and the baseline for 0-parameter tools is 4, which is appropriate here.

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 clearly states the tool returns a list of live agent-ready data packs on DaedalMap, with the specific verb 'Returns' and resource. This distinguishes it from sibling tools like get_pack (which presumably fetches a specific pack) and resolve_point (which likely resolves a point).

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 phrase 'Free discovery' implies the tool is for discovering available data packs, but it does not explicitly state when to use this tool over alternatives or provide exclusions. It offers implied usage context but lacks explicit guidance or mention of sibling tools.

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