NEXO Brain

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

With no annotations provided, the description carries full burden for behavioral disclosure. It mentions the core behavior ('stop tracking files') and the conditional logic (release all if no paths given), but lacks critical information: what 'tracking' means, whether this is reversible, what permissions are required, what happens to the files after untracking, or any side effects. The description is minimal and doesn't provide adequate behavioral context for a mutation operation.

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 extremely concise with zero wasted words. It uses a clear two-part structure: purpose statement followed by parameter explanations. Every sentence earns its place by providing essential information about the tool's behavior and parameters.

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?

Given that this is a mutation tool with no annotations, 0% schema description coverage, but with an output schema present, the description is minimally adequate. It covers the basic purpose and parameter semantics but lacks important context about what 'tracking' means, the implications of untracking, and behavioral details. The output schema existence means return values are documented elsewhere, but the description should do more for a mutation operation.

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%, so the description must compensate. It provides clear semantic meaning for both parameters: 'sid' as session ID and 'paths' as file paths to release, with the important clarification that omitting paths releases all. This adds significant value beyond the bare schema, though it doesn't specify path format or constraints.

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 action ('Stop tracking files') and resource ('files'), making the purpose evident. It distinguishes from sibling 'nexo_track' by being the inverse operation. However, it doesn't specify what 'tracking' entails in this context, leaving some ambiguity about the exact nature of the operation.

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 implied usage guidance: use with specific paths to release those files, or omit paths to release all. However, it doesn't explicitly state when to choose this tool over alternatives or mention any prerequisites beyond the session ID. No sibling tool comparisons or exclusion criteria are provided.

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