updateActivityState

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

No annotations are present, so the description carries the full burden of behavioral disclosure. It only states that the state is updated and lists the possible values; it does not explain whether transitions are restricted, whether the operation is reversible, what effects each state has on visibility, or what happens side-effect-wise.

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 a single sentence with no filler, and the primary action is front-loaded. It includes the essential state values without unnecessary elaboration, making it appropriately concise for the tool's simplicity.

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 simple two-parameter mutation, the description is minimally adequate, but there are clear gaps. It omits usage guidance relative to the many sibling tools, transition constraints, side effects, and any indication of the response or error behavior, which matters more because no output schema or annotations are provided.

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%, and both parameters already have meaningful descriptions: 'Activity ID' and the state enum with its values. The description adds no new parameter semantics beyond naming the state values, so the baseline of 3 applies.

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 clearly states the specific action: 'Update the state of an activity' and lists the three supported states, making the tool's purpose immediately understandable. It is distinguishable from the sibling updateABActivity by narrowing the scope to state changes, though it doesn't explicitly name or contrast the sibling.

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?

No guidance is given about when to use this tool versus updateABActivity or other activity tools. There is also no mention of prerequisites, transition rules, or scenarios where this tool should or shouldn't be used, so the agent must infer usage from the name and schema alone.

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