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 adds only that markets are also accepted and says nothing about side effects, whether the item is removed from the library, or what is returned — nothing beyond what annotations provide.

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 redundant wording and the scope front-loaded. It is efficient, though the brevity edges toward under-specification rather than ideal 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?

The tool is simple (one required parameter, full schema coverage, annotations present, no output schema), so little prose is required. Still, for a state-changing unsubscribe action the description omits the counterpart relationship and the effect of the call, leaving it only minimally adequate.

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 coverage is 100% and the id parameter description already enumerates ch: ids, datasnack.ai/m/ URLs, and market ids from search_models. The description's '(or market)' merely echoes that, so the baseline 3 for a single fully documented parameter 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 states a specific verb ('Stop following') and resource ('a model'), and parenthetically extends the resource to markets. It is clearly the inverse of the follow_model sibling, so an agent can tell them apart, though it never names that sibling explicitly.

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 versus follow_model, no prerequisites, and no note about what happens when the model is not currently followed. Usage is only implied by the verb 'Stop following'.

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