List calls

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

The readOnlyHint annotation already covers safety, and the description adds pagination behavior and response content. However, it does not disclose ordering, date range, rate limits, or other operational traits that would provide richer behavioral context beyond the annotation.

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 concise sentence with no filler. The primary purpose is front-loaded, and the pagination note is compact and relevant.

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 simple read-only list tool, the description is minimally adequate: it states what is returned and that results are paginated, and the schema provides page/per_page constraints. However, with no output schema and no usage guidance, the description leaves the agent with limited contextual knowledge about response shape or how this list differs from other list tools.

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 0%, and the description only contains 'Paginated' to hint at the page and per_page parameters. It does not explain how pagination works, default behavior beyond the schema values, or any trade-offs of using these parameters.

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 lists call history and specifies the contained data fields (caller ID, direction, status, voicemail). The resource is identifiable, though it does not explicitly differentiate itself from sibling tools like talk_get_call or talk_list_devices.

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?

No guidance is given for when to use this tool versus alternatives. There is no mention of exclusions, prerequisites, or scenarios favoring another sibling, leaving the agent to infer usage from the name alone.

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