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

readOnlyHint=true already tells the agent this is a safe read, so the description only needs to add beyond that. It contributes the 'control-plane' framing and the concrete endpoint path, which are modestly useful, but it says nothing about pagination behavior, result size, or failure modes.

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 compact clauses, with the core purpose front-loaded and the clarifying parenthetical immediately after. Nothing is wasted, though the endpoint path is arguably filler for an agent that cannot call URLs directly.

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 zero-required-parameter read-only list with full schema coverage and readOnlyHint, the safety and input story is complete. However, with no output schema, the description never indicates what a listed binding contains or how nextPageToken is surfaced, leaving a modest completeness 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?

All three parameters are fully documented in the schema (pageSize max 200, pageToken as opaque cursor, account_id override), and the description adds no parameter detail at all. Baseline 3 is appropriate when schema coverage is 100%.

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 gives a specific verb and resource ('List deployed models') and disambiguates with the parenthetical '(model↔deployment bindings)', which separates it from the ambiguous siblings fireworks_list_models and fireworks_list_deployments. It stops short of explicitly naming those alternatives, so it is clear but not maximally distinguishing.

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?

There is no when-to-use guidance, no condition selecting this tool over the near-identical fireworks_list_deployments or fireworks_list_models siblings, and no note on prerequisites. The endpoint path is context, not usage guidance.

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