read_file

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

Without annotations, the description carries full burden. It discloses path confinement behavior, which is beyond the schema. However, it omits other important behaviors such as how non-existent files are handled, encoding assumptions, permissions, or rate limits. The description adds some value but is not comprehensive.

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 two sentences, front-loading the main purpose. Every sentence adds necessary information, with no filler or redundancy.

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 the tool has 3 parameters, no output schema, and no annotations, the description is moderately complete. It covers core behavior (reading content) and a key constraint (path confinement), but lacks details on return format, error conditions, and line number handling. For a read file tool, more completeness would be beneficial.

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 100%, so baseline is 3. The description adds value by explaining the path confinement rule, which is not in the schema. This goes beyond what the schema provides. However, it does not clarify the semantics of start_line and end_line (e.g., inclusive/exclusive), leaving some ambiguity.

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 ('Read') and the resource ('project file'), making the tool's purpose immediately identifiable. It also distinguishes from sibling tools like list_files (which lists files) and search (which searches content).

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 a key usage constraint (paths confined to project root unless environment variable set) but does not explicitly guide when to use this tool over alternatives like jambavan_watch or search. It implies usage for reading file content but lacks explicit when-to-use or when-not-to-use guidance.

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