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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds what the response contains (description, embedded video-highlight metadata), which is largely redundant with the output schema and adds little behavioral context such as freshness or availability constraints.

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?

A single well-formed sentence with zero waste, and the differentiating detail (slug source) is front-loaded alongside the purpose.

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?

For a one-parameter read-only detail tool with an output schema and read-only annotations, the definition is essentially complete. The only minor gap is that return-value framing is partly redundant with the output schema.

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% and the single "live" parameter is documented as the conversation slug in the schema itself. The description repeats that the slug originates from foreignpolicy_live but adds no syntax or format detail beyond the schema, so the baseline 3 applies.

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?

States a specific verb ("Fetch") and resource ("a public FP Live conversation") and explicitly differentiates itself from the sibling foreignpolicy_live by noting the slug comes from it. An agent can tell this is the detail-lookup tool versus the list tool without opening either schema.

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 mention that the slug is "returned by foreignpolicy_live" implies a list-then-detail workflow, which is useful chaining context. However, there is no explicit when-to-use statement and no exclusions or conditions that would route the agent away from this tool.

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