read_file_content

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

With no annotations, the description carries the full burden of behavioral disclosure. It only says 'Read the content' – implying a safe read, but it does not state that reading is limited by max_size, how large files are handled, what happens on missing files, or the return format. For a tool with no annotations, this is a significant gap.

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, short sentence with no filler words. It is front-loaded and easy to scan. However, it is so brief that it omits valuable behavioral details, so it earns a 4 rather than a 5.

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?

For a simple file-reading tool, the schema documents parameters and the description states the core purpose. Yet, given there is no output schema and no annotations, the description should at least hint at return semantics or limitations (e.g., 'returns file contents as a string'). The current description is minimally adequate but leaves room for ambiguity about edge cases.

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?

The input schema has 100% coverage; all three parameters (file_path, encoding, max_size) are described in the schema. The description adds 'optional encoding' but that is redundant with the schema's default. Since the schema already explains parameters, the description's contribution is minimal, meeting the baseline of 3.

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 clear verb ('Read') and resource ('content of a file'), and mentions optional encoding. It is unambiguous, but it does not distinguish from sibling tools like count_lines_in_file, which also reads a file (to count lines). Without naming the sibling, an agent could confuse the two.

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. There is no mention of exclusions (e.g., 'use count_lines_in_file when you only need line counts') or prerequisites (e.g., file existence, permissions). The description leaves all selection reasoning to the agent.

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