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

The description goes beyond the annotations by disclosing the encryption algorithm (AES-256-GCM), that the value is never stored or returned in plaintext, and the permission requirement. It does not detail duplicate-name behavior or return values, but the annotations and schema already set a clear safety profile.

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 and every sentence adds distinct value: purpose, encryption behavior, permissions, sibling tool guidance, and parameter targeting. There is no redundant or filler content.

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 create-style tool with no output schema and generic annotations, the description is thorough enough for correct selection and invocation. It covers security, permissions, alternatives, and the required targeting parameter, leaving no critical operational gap.

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 input schema covers all six parameters with descriptions, so the baseline is 3. The description adds the explicit instruction to pass playbook_id as the target UUID/GUID, but this largely repeats the schema's existing parameter description and does not materially enrich parameter semantics.

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 states a specific action ('Store a new encrypted secret') with the resource and key security property. It distinguishes itself from sibling tools by explicitly referencing rotate_secret, list_secrets, and use_secret for adjacent operations.

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 provides explicit when-to-use and when-not-to-use guidance: use rotate_secret for replacing an existing value, list_secrets to confirm names, and use_secret for authenticated requests. It also states the required permission level (secrets:write or full permission).

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