NEXO Brain

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the action ('Link') but doesn't clarify if this is a read-only or mutation operation, what permissions are required, whether it's idempotent, or what happens on failure. This leaves significant gaps for an agent to understand the tool's behavior.

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, clear sentence with no wasted words, making it highly concise and front-loaded. Every part of the sentence directly contributes to explaining the tool's purpose.

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 there is an output schema (which should cover return values), the description's minimalism is somewhat acceptable. However, for a tool with 2 parameters and no annotations, the description lacks crucial details about behavior and parameter semantics, making it incomplete for safe and effective use by an agent.

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%, meaning the input schema provides no descriptions for the parameters 'id' and 'commit_ref'. The tool description does not add any meaning beyond the schema, failing to explain what 'id' refers to (e.g., change log entry ID) or the format of 'commit_ref' (e.g., git commit hash). This lack of compensation results in poor parameter understanding.

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 ('Link') and the resources involved ('a change log entry' and 'its git commit hash'), providing a specific verb+resource combination. However, it doesn't explicitly differentiate from sibling tools like 'nexo_change_log' or 'nexo_change_search', which might handle change log entries differently.

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?

No guidance is provided on when to use this tool versus alternatives. The description lacks context about prerequisites, such as whether a change log entry must exist first, or when linking is appropriate compared to other change-related tools in the sibling list.

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