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 adds value beyond that by disclosing the shape of what comes back ('each company with its latest change, each space with what it covers') and that results are scoped to 'the rep' — helpful given there is no output schema. It does not cover ordering, pagination, or what an empty result means.

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?

Two short sentences with no filler, and the resource definition is front-loaded ahead of the optional filter behavior. Every clause carries information about either the resource or the parameter.

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 single optional-param, read-only listing with no output schema, the description is largely sufficient: it names the resource, the per-kind detail returned, and the filter. Missing only minor operational details such as default behavior with no kind and result ordering.

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%, so the description must carry the single parameter — and it does, explaining that 'kind limits it to company or space watches', which maps onto the company/space enum. The only gap is that it does not state what happens when kind is omitted (presumably both kinds are returned).

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 identifies the resource precisely: companies and spaces the rep watches, with the latest change per company and coverage per space. This reads clearly as a watch-inventory listing and is distinguishable from siblings like list_targets, check_space_watch, and watch_company, though the verb (list) is only implied by the name rather than stated.

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 when-to-use or when-not-to-use guidance, and no routing to the closest siblings (check_space_watch, list_targets, save_space_watch, unwatch). The only usage-adjacent statement is that 'kind limits it to company or space watches', which is parameter guidance rather than tool-selection guidance.

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