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

Goes well beyond the readOnlyHint/destructiveHint annotations by disclosing that values are never returned by any tool (though run code can print one), that listings are scoped to the key's organization, what fields are included, and the exact role requirements. This is the kind of context annotations cannot carry.

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?

Purpose and alternatives are front-loaded in the first sentence, permissions at the end. It is somewhat dense and run-on in the middle ('each with its _id, name, type...'), but every clause adds real information.

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?

With no output schema and no parameters, the description compensates by describing the scope of the listing, the fields returned, the secrecy guarantee, and the permission gate. Nothing material is missing for correct invocation.

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?

Zero parameters, so the baseline is 4. The description usefully reinterprets the response fields (id, name, type, project/environment scope, timestamps), though it is not required to describe parameters.

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 and resource ('List the Secrets of the organization this key belongs to') and explicitly names the sibling tools it serves (fastero_update_secret, fastero_create_secret). An agent can distinguish it from the other secret-related tools without opening a schema.

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?

Gives explicit when-to-use conditions: to find the id that fastero_update_secret takes, or to check a name before fastero_create_secret. It also states the permission model (owners/admins/editors can list, viewers are refused), which tells the agent when the call will fail.

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