passkey_generate_auth

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

With no annotations provided, the description carries the full burden of behavioral disclosure. 'Generate' implies a code-writing operation, but the description does not state whether files are created or modified, whether existing files get overwritten, what prerequisites are needed, or what the side effects are.

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 a single sentence with no filler and front-loads the core verb and resource. It is efficient, though slightly too terse for a tool with two parameters and a large sibling context.

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 generation tool with no annotations, no output schema, and incomplete parameter documentation, this description is insufficient. It does not explain what an 'authentication flow' entails in terms of side effects, output, or prerequisites, nor does it help an agent distinguish this from the registration flow.

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 only the directory parameter, while api_key is undocumented. The description adds no parameter meaning, leaving the agent to infer api_key's role from its name. Because the description fails to compensate for the partial schema coverage, this is below the baseline.

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 states the verb 'Generate' and the resource 'WebAuthn authentication flow,' making the tool's purpose understandable. However, it doesn't explicitly distinguish itself from siblings such as passkey_generate_registration or passkey_setup_server, so it falls short of a 5.

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 guidance is provided on when to use this tool versus alternatives like passkey_generate_registration or passkey_setup_server. The description is only a bare purpose statement and offers no context, exclusions, or selection criteria.

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