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

With no annotations, the description carries the burden and does well: it discloses the no-auth nature of pricing, the alias between usage and keys, the account-wide effect of history_on/off, and the deliberate exclusion of deletion. It does not discuss side effects of toggling history or error behavior, but the core behaviors are transparent.

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 with a clear summary, followed by a compact action list where every line adds distinct value. The deletion note is relevant and prevents misuse without unnecessary verbosity.

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?

The description covers most actions and even a non-action, but it omits the meaning/source of apiKey, gives only partial return-value information for some actions, and does not resolve the required-apiKey vs no-auth tension. Since there is no output schema, more return detail would be expected for full completeness.

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 action parameter is well documented with enumerated values and semantics, which compensates for the schema's bare string type. However, apiKey is not explained, and there are conflicts: the schema requires apiKey while the description says pricing needs no auth, and action is required while the description calls status the default. This undermines full parameter clarity.

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 resource (account) and the operations: view account info, pricing, entitlements, or list keys. The action list removes ambiguity, and the explicit note that history deletion is not an MCP action further distinguishes this tool's scope from related endpoints.

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 gives explicit guidance per action, notes that pricing requires no auth, and explicitly says history deletion is not an MCP action, directing the user to POST /api/v1/requests/delete and the dashboard. This is a clear when-to-use and when-not-to-use statement.

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