update_activity

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

Annotations already declare readOnlyHint=false, destructiveHint=false and openWorldHint=true, so the safety profile is carried structurally. The description adds that this is a partial update limited to name and description, but it never states what happens to omitted fields, whether existing values are preserved, or what errors occur for an invalid activity_id.

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, and the action scope is stated before anything else. The brevity is appropriate, though the same terseness is what leaves behavioral gaps elsewhere.

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 values needn't be explained, and annotations cover the mutation safety profile. Still, for a write tool with zero parameter descriptions, the definition omits partial-update semantics and validation expectations, leaving a moderate 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?

Schema description coverage is 0%, so the description must compensate. It implicitly maps 'rename' to name and 'set its description' to description, covering two of three parameters, but activity_id is never mentioned and nullability/default semantics are left entirely to the schema.

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 pair (rename / set description) against a specific resource (an activity), which is far clearer than the tool name alone. It does not explicitly contrast with get_activity or list_activities, but those are clearly read tools so the mutation intent is unambiguous.

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 versus get_activity, no prerequisites (does the activity need to exist? does it need to be user-created?), and no note that only name/description are mutable while other fields are not. The agent must infer usage entirely.

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