Fetch numbers for user

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is covered; 'Read-only' in the description largely repeats this. The description does add the underlying endpoint path (GET /webex/users/{id}/numbers), which is modest extra context but not rich behavioral detail like pagination 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?

Extremely short and front-loaded, with the action and endpoint stated immediately and no wasted prose. The telegraphic fragments are efficient, though slightly under-specified rather than padded.

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 tool with full schema coverage and rich annotations, the core is present. The main gap is the absence of sibling differentiation (especially versus update_webex_user_numbers), which leaves the agent to infer the read/write boundary.

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 schema fully documents all four parameters including the enum for response_format. The description adds no parameter-level meaning beyond the schema, which is the expected baseline when the schema does the work.

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 (Fetch) and resource (numbers for a webex user), which an agent can distinguish from most siblings. However, it does not explicitly differentiate from the closely-related write sibling placetel_update_webex_user_numbers, so the read/write split is only implied by 'Read-only'.

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?

There is no explicit guidance on when to use this versus alternatives such as placetel_update_webex_user_numbers or placetel_get_webex_user_license. The agent must infer usage entirely from the name and the 'Read-only' tag.

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