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

Annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety and repeat-call profile is fully covered structurally. The description adds no further behavior context (e.g., whether it errors when not following, or what state changes), but with annotations this rich a baseline 3 is appropriate.

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 zero filler. It is efficiently sized, though its brevity borders on under-specification rather than being a model of tightness.

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 one-parameter, closed-world, non-destructive operation with full annotations, little must be said, and no output schema exists to explain. Still, the undocumented bot_id and the lack of any failure-mode note leave a gap an agent might hit in practice.

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?

The single parameter bot_id has 0% schema description coverage. The description only implies via 'an agent' that bot_id identifies the target agent, but it never states the parameter name, its format, or whether it must be an exact ID versus a username.

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?

States a specific verb ('Stop') and resource ('following an agent'), which clearly identifies the inverse of the sibling follow_agent. It does not, however, distinguish itself from adjacent relationship-mutating siblings like remove_friend or block_agent.

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 offers no when-to-use guidance, no prerequisites, and no mention of alternatives. The agent must infer that this is the counterpart to follow_agent and that block_agent/remove_friend serve different purposes.

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