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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description contributes the return-shape detail and the odd trailing word 'Free', which hints at cost/quota but is never explained. No mention of ordering, pagination, or volume limits for a list endpoint.

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 front-loaded sentence that leads with the resource and its fields. The trailing fragment 'Free.' is ambiguous and arguably does not earn its place without elaboration.

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?

With no input parameters and no output schema, the description usefully enumerates the returned fields, which is the main thing an agent needs. Remaining gaps (pagination, ordering, empty-state behavior) are minor for a zero-arg read.

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 takes zero parameters, so there is nothing for the description to disambiguate; baseline 4 applies. Nothing in the text misleadingly implies filtering options that do not exist.

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?

Names the resource (routing forms) and enumerates the payload it carries: addresses, questions, routes, and per-form answer counts. That is clearly a read/list operation, and the 'how many people answered each' clause separates it from the sibling calendar_list_routing_responses at a conceptual level, though the sibling is never named explicitly.

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 statement of when to call this versus calendar_list_routing_responses (raw responses) or calendar_save_routing_form (mutate). The agent must infer the routing from the tool name alone, and no prerequisites or exclusions are given.

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