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

Annotations already flag destructiveHint=true and readOnlyHint=false; the description adds a concrete consequence ('Making it public') and the prerequisite state ('held by reply approval'). It doesn't explain 'ignore' behavior or the return format, but it extends beyond annotations meaningfully.

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 short, front-loaded sentences with no filler. Each clause carries signal: platform, action, scope, effect, and workflow hint.

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 schema fills in parameter details and queue-listing behavior, but with no output schema the description doesn't state return values, 'ignore' semantics are under-specified, and the 'pending: true' hint is ambiguous without naming a tool. A small but real gap remains.

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 75%, with approve, replyId, and workspaceId already documented. The description adds no new parameter detail; the 'pending: true' remark isn't a parameter on this tool and doesn't clarify any input.

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 ('approve') and resource ('a reply held by reply approval'), scopes the tool to Threads, and clarifies the outcome ('makes it public'). This clearly distinguishes it from siblings like delete_reply, hide_reply, and reply.

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 a clear usage context: Threads-only, for replies held by reply approval, and instructs the agent to read the queue with 'pending: true' before acting. It doesn't name alternatives or state exclusions explicitly, but the context is sufficient to route correctly.

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