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

readOnlyHint=true already declares this a safe read, so the description need not re-establish safety. It does add the API route and the response envelope 'Returns { meta, response }', which is genuinely useful given there is no output schema, but it stops short of describing pagination behavior, meta contents, or rate limits.

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: purpose first, then endpoint, then capabilities and return shape. Efficient, though the parameter-name list is redundant given the schema.

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 read-only list tool with zero required params, full schema coverage, and no output schema, the description covers identity, endpoint, query capabilities and the return envelope. Only minor gaps remain (no mention of filtering by status/owner semantics or of pagination defaults, though those live in the schema).

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% and each parameter carries its own detailed description (including the _filters example syntax), so the schema does the heavy lifting. The description merely lists the same parameter names, adding no semantic detail beyond what the schema already provides.

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+resource and even disambiguates the domain ('companies (client organizations)'), plus the backing endpoint. It does not, however, differentiate itself from sibling readers like get_company or from list_staff/list_contacts, so an agent must infer the list-vs-single distinction from names alone.

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?

Usage is only implied: the mention of _search/_filters hints at how to narrow results, but there is no explicit 'use this to enumerate all companies; use get_company for one' routing, and no exclusions or prerequisites. Adequate but not directive.

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