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

With no annotations, the description carries the burden, and it decently discloses behavior: it groups spelling variants, returns a breakdown by status and standard, and returns the certificates themselves. It also transparently explains the non-obvious grouping rule about one registration versus corporate families. It does not mention auth, rate limits, or pagination, but for a simple read-style vendoor lookup the core behavior is adequately disclosed.

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?

The description is front-loaded with the main purpose and each sentence serves a role: definition, example, return contents, and grouping caveat. The nShield example is slightly detailed but earns its place by preventing a likely misinterpretation. Overall it is well-structured and reasonably concise.

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 tool with only two simple parameters and no output schema, the description provides enough to understand purpose, return value, and an important scoping caveat. It does not describe the exact response shape or how 'limit' applies, but the essential invocation context is present.

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 schema describes 'vendor' as a name or part of one; the description adds useful nuance by explaining that vendoor matches NIST spelling variants and that one company can appear as multiple strings. However, the 'limit' parameter is not addressed in the description, and with 50% schema coverage the description only partially compensates for the undocumented parameter.

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 clearly identifies the tool as returning all certificates held by one company, grouped by the spelling variants NIST uses, and states it returns a status/standard breakdown plus the certificates. This is specific and understandable, though it does not explicitly differentiate it from sibling tools like fips_search or fips_cert.

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?

The description gives clear context for when the tool is appropriate: looking up everything a single registration holds. It also clarifies what the grouping does not include—corporate families, with a concrete nShield/nCipher/Thales example—which helps avoid misuse, but it does not name alternative tools or provide explicit when-not-to-use conditions beyond that caveat.

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