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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered structurally. The description adds only that the result pairs environments with their current states, and says nothing about pagination, result size, or whether undeployed environments appear.

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?

A single front-loaded sentence with no filler — the verb and scoped resource come first and nothing is repeated from the name or annotations. It is efficient, though arguably too sparse given the sibling overlap it never resolves.

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?

An output schema exists, so return-value shape need not be described and the required apiId is at least implied. Still, for a listing tool sitting beside deployment_get_state and deployment_history, the definition is thin on disambiguation and on whether results are paginated.

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 description coverage is 0% and apiId carries no description in the schema. The description supplies only the weak hint 'for an API', leaving the identifier's expected format (ID vs. slug/name) and whether it accepts an API version unstated.

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?

Clear verb+resource: 'List deployment environments and their states for an API.' This distinguishes it from the mutation and history siblings (deployment_deploy, deployment_rollback, deployment_history). However, it does not differentiate itself from deployment_get_state, which by its name appears to return the same per-environment state information.

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 guidance on when to use this tool versus deployment_get_state (single-environment state) or deployment_history (past state changes). The agent must infer the boundary between listing all environments and fetching one environment's state from names alone.

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