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

readOnlyHint=true already declares the safe-read profile, so the description only needs to add context. It does add one useful fact — the operation is a POST-based list endpoint (/v1/pets:list) — but says nothing about pagination behavior, result size limits, or ordering, which matter for a paged list tool.

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?

Three short, front-loaded sentences with no filler; the scope statement comes first and the endpoint is last. Slightly terse rather than padded, which is the right failure mode here.

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?

Six parameters with full schema documentation and a readOnly annotation cover the mechanics, but with no output schema the description should at least say what a pet record or the pagination envelope looks like, and it does not.

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 baseline is 3. The description roughly maps to customer_ids and updated_after/updated_before, but it calls them "owner ids" while the schema field is customer_ids, and it omits page_size/page_token semantics entirely.

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 and resource ("List pets of a company") with the scoping entity named, so the agent knows exactly what is returned. However, it never distinguishes itself from the very similar sibling moego_list_customer_pets or from moego_get_pet, leaving a real risk of sibling collision.

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?

"Filter by owner ids or last update time" implies when the two filter modes are useful, but there is no explicit when-to-use guidance, no exclusion of alternatives, and no stated reason to pick this over moego_list_customer_pets.

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