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

Annotations already declare idempotentHint=true, destructiveHint=false, and readOnlyHint=false, so the safety profile is covered. The description contributes one piece of extra context—that following an idea is tied to email notifications—but does not say whether the follow state itself is removed or only the email subscription, which matters for an agent reasoning about reversibility.

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?

Four words with no filler, but the terseness borders on under-specification rather than efficient communication; the pronoun "it" is unresolved within the description itself. It is well front-loaded with the outcome, which is the most useful part.

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 single-parameter tool with full schema coverage and complete annotations, the description provides just enough for an agent to invoke it correctly. However, it leaves the object of "it" and the interaction with follow_idea unexplained, and there is no output schema so no return-value expectations are set.

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?

There is a single required parameter with 100% schema description coverage, so the schema already carries parameter meaning. The description adds nothing about the idea_id format or where to obtain it, so baseline 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?

"No more email about it" conveys the effect (stopping email notifications) but never names the verb or resource, relying on the title "Stop following an idea" to establish what is actually happening. An agent reading the description alone gets a vague sense of the outcome rather than a specific verb+resource statement, and there is no reference to the inverse sibling follow_idea.

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, nor any mention of the paired follow_idea tool or the conditions under which someone would stop following. The inverse relationship is only inferable from the tool name.

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