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

With no annotations provided, the description carries the full burden of behavioral disclosure. It explains side effects of both actions: release joins or opens a request and triggers the usual acknowledgement; dismiss drops files and deletes the row after 30 days. The full-write-access requirement is also disclosed.

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 appropriately sized and front-loaded with the purpose. Each sentence adds useful detail, though the 'release' sentence is long and somewhat dense, containing multiple clauses that an agent must unpack.

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 two-parameter mutation tool with no output schema and no annotations, the description covers the essential context: permissions, side effects, and decision semantics. It does not describe the return value or error behavior, but those are not critical for correct invocation here.

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 schema already covers both parameters fully, including the source of letterId and the allowed decision values. The description adds meaningful nuance by explaining what 'release' and 'dismiss' actually do, which goes beyond the schema's terse 'release' or 'dismiss'.

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 names a specific verb ('decide') and resource ('held or failed letter'), and defines the two outcomes ('release' and 'dismiss') with concrete meanings. This clearly distinguishes it from sibling tools like list_support_letters and get_support_letter, which only read or list letters.

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?

The description gives clear conditions for when each decision applies: 'release' when the letter proves it answers a request, 'dismiss' when it is not a request. It also notes the permission requirement. It does not explicitly say when not to use this tool versus alternatives, but the decision criteria are concrete enough for an agent to route correctly.

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