Follow or unfollow a user

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

Annotations already provide readOnlyHint: false, idempotentHint: true, and destructiveHint: false, so the agent knows this is a non-destructive, idempotent write operation. The description adds no extra behavioral context beyond what annotations convey, but it does not contradict them either.

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, front-loaded sentence that immediately conveys the action and target. Every word earns its place, with no unnecessary filler.

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 tool with good annotations and no output schema, the description is adequate. It covers the action and key parameter semantics. It omits potential details like auth requirements or return behavior, but these are less critical for a straightforward toggle action.

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?

Despite 0% schema description coverage, the description compensates by explaining both parameters: 'numeric user id' clarifies user_id and 'follow or unfollow' clarifies the boolean follow parameter. However, it does not explicitly state which boolean value corresponds to follow versus unfollow, leaving a minor 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 clearly states the tool's purpose: 'Follow or unfollow another Backloggd user by their numeric user id.' It uses a specific verb ('follow or unfollow') and a specific resource (user by numeric id), effectively distinguishing it from siblings like get_follows or search_users.

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?

The description provides no guidance on when to use this tool versus alternatives. It does not mention related tools such as get_follows for viewing current follows or search_users for finding users, nor does it state any prerequisites or exclusions.

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