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

Annotations already declare readOnlyHint=false, idempotentHint=true, and destructiveHint=false, so the safety profile is partly covered. The description adds only the vague "privacy-filtered" qualifier and does not disclose what the update affects, what authorization is needed, or what happens on version conflict beyond what the schema's expectedVersion field already says.

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 or redundancy. It is efficient, though the terseness comes at the cost of clarity rather than from disciplined editing.

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 mutation tool with seven parameters, a nested object, and no output schema, the description is far too thin. It never explains what state the release transitions to, what the required handoffId/expectedVersion combination implies operationally, or what a successful call returns.

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 100%, so all seven parameters including the nested details object are already documented in the schema; baseline 3 applies. "privacy-filtered project metadata" loosely gestures at the details payload but adds no format, constraint, or meaning beyond what the schema already states.

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 verb (Update) and a resource (hosted relay release), but "relay release" is undefined jargon and the phrase gives no way to distinguish it from siblings like relay_accept, relay_mark_sent, relay_sync_completion, or relay_status. An agent cannot tell what a "release" actually does or how it differs from the other relay_* tools.

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 prerequisites, and no mention of any alternative among the many relay_* siblings. The agent is left to guess whether release follows mark_sent, sync_completion, or something else.

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