diff_dbcs

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

Annotations already declare readOnlyHint=true, destructiveHint=false, and idempotentHint=true, so the safety profile is covered. The description adds the notion of 'bounded' output, which suggests a limit on results, but this is not elaborated (e.g., what bound applies). There is no contradiction with annotations.

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 sentence that is direct and front-loaded. It avoids unnecessary detail while covering the core purpose and output type, making it highly efficient.

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 has only two required string parameters and an output schema, so the description covers the core functionality adequately. However, the term 'bounded' is vague and could benefit from clarification, and the description does not mention any potential failure modes (e.g., file access errors), though this is a minor gap for a read-only diff tool.

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%, but the parameter names (dbc_a_path, dbc_b_path) are self-explanatory. The description mentions 'two local DBC files' but does not explicitly clarify the order or format of the paths, leaving some ambiguity. Given the simple, self-descriptive parameter names, the description provides minimal additional value.

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 uses a specific verb ('Compare') and resource ('two local DBC files') and clearly states the type of output (bounded added, removed, and changed message/signal details). This clearly distinguishes it from sibling tools like validate_dbc or dbc_info, which serve different purposes.

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 implies the tool is for comparing two DBC files, but it does not explicitly state when to use it over alternatives or mention exclusions. Sibling tools like validate_dbc and dbc_info are not referenced, so the user must infer usage from the purpose alone.

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