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

The readOnlyHint annotation already covers safety, and the description adds minimal context (e.g., 'live' and 'agent-ready'). It does not detail output structure, pagination, or potential side effects, which is a gap given the absence of an output schema. However, for a zero-parameter read-only tool, the description is not misleading.

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 two sentences: 'Free discovery.' and 'Returns the list of live agent-ready data packs available on DaedalMap.' It is front-loaded with a clear phrase, every word earns its place, and it avoids redundancy.

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's simplicity (no parameters, no output schema, read-only annotation), the description adequately covers the essential return value and context. It tells the agent exactly what to expect: a list of live, agent-ready data packs. No further details are necessary for this kind of discovery tool.

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 baseline for parameter semantics is 4. No parameter details are needed, and the description correctly focuses on the return value. There is nothing to complain about 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's purpose with a specific verb ('Returns') and resource ('list of live agent-ready data packs'). It distinguishes itself from sibling tools focused on disaster links and data queries, making its function obvious.

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' suggests a low-cost way to explore available data packs, but it does not explicitly mention when to use this tool over alternatives like get_pack or query_dataset. It provides clear context without exclusions, fitting the 'clear context, no exclusions' baseline.

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