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

The annotations declare this as a destructive, non-read-only mutation, so the description should explain what locking entails: whether it is irreversible, whether other options become unavailable, and what permissions are required. None of that is disclosed. 'Lock' hints at finality but doesn't define the consequence.

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 short sentence with no wasted words and the action front-loaded. It is efficient, though the brevity contributes to the missing behavioral and parameter detail.

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 destructive mutation with zero schema documentation and no output schema, the description should carry much more: side effects, irreversibility, required authorization, and parameter meanings. As written, an agent cannot confidently invoke it without guessing.

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% across all four parameters, including a completely undocumented 'token' parameter. The description alludes to an activity and an option but adds no meaning about spaceId, activityId, optionId, or token formats, so it fails to compensate for the schema gap.

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 states a specific verb and resource ('Lock one option of an open activity choice'), which distinguishes it from sibling operations like activities_tick_choice and activities_offer_choice. It is clear what the tool does, though it doesn't explain how 'lock' differs from 'tick' or 'answer'.

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 tool versus alternatives such as activities_tick_choice or activities_answer, nor any prerequisites (e.g., that the activity must be open or that the option must exist). Usage must be inferred from the name alone.

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