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

Beyond the annotations, the description discloses permission requirements ('Only organization owners and admins'), name-collision refusal, project-level override behavior, and the important security fact that the value is never returned by any tool and is kept in plain text in the client transcript. The annotations say readOnly=false and destructive=false, which the description is consistent with: this creates a new secret rather than reading or destructively modifying existing data.

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 dense but front-loaded: it defines the resource first, then scoping, then collision/alternative behavior, then permission and return semantics. Every sentence carries operational or safety information, though the single long paragraph could be easier to scan if split.

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 three-parameter creation tool with no output schema, the description covers scope, override behavior, permissions, failure conditions, return shape, and the unusual value-handling/security caveat. An agent has enough information to decide whether to call this tool and what to expect.

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 coverage is already 100%, so the baseline is 3, but the description adds meaning beyond the schema: projectId omission scopes the secret to the whole organization, project-level secrets override same-named organization secrets, and duplicate names at the same level are refused. It also reinforces that value is write-only and never returned.

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 opens with a specific verb and resource ('Create a text Secret') and immediately defines what a Secret is and how it is consumed. It distinguishes creation from replacement by naming fastero_update_secret and mentions fastero_list_secrets as the way to find ids, so an agent can separate it from sibling tools.

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?

It explicitly states the project-vs-organization scoping choice via projectId and the override rule. It also names the alternative for replacing an existing value (fastero_update_secret) and the discovery tool for ids (fastero_list_secrets), leaving little to infer.

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