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

Discloses non-mutating nature and redaction behavior, complementing the readOnlyHint annotation. Adds value by explaining that reveal=true returns the value and that NOREVEAL forces redaction.

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 concise sentences with no fluff. The first sentence states purpose, and the second adds key behavioral nuance. Every word earns its place.

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?

Given the comprehensive schema and annotations, the description is largely complete. It covers core purpose and critical behavioral traits. Could briefly mention that parameters like uppercase/lowercase control character sets, but schema already handles that.

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 covers all 14 parameters with descriptions. The description does not add new parameter-level meaning beyond the schema, so baseline score of 3 is appropriate.

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?

Clearly states 'Generate a password or passphrase' with specific verb and resource. Distinguishes from sibling keychain_generate_username by focusing on passwords/passphrases and explicitly noting it never mutates the vault.

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?

Provides some usage context (reveal, NOREVEAL) but does not explicitly state when to use this tool versus alternatives like keychain_generate_username or other creation tools. Lacks explicit when-to-use and when-not-to-use guidance.

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