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

No annotations are provided. The description indicates mutation ('replace') but does not disclose potential side effects, error conditions (e.g., index out of bounds), or required permissions. This is a significant gap for a mutation tool.

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?

A single, front-loaded sentence that efficiently conveys the core purpose. No unnecessary words. Slight improvement possible by specifying 'text input field' for clarity, but overall concise.

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?

An output schema exists, so description need not detail return values. However, for a mutation operation, it should mention error handling (e.g., invalid index). Leaves out important behavioral context that cannot be inferred from schema or annotations.

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 clarify parameter meanings. It does: 'index' is the snapshot index, 'text' is the value. However, it does not provide constraints like allowed text formats or that index must be valid. Adds basic semantics but not comprehensive.

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: 'Replace the value of an input at snapshot index N with the given text.' It specifies the verb 'Replace' and the resource 'input at a snapshot index', distinguishing it from navigational tools or text retrieval tools like get_text.

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 explicit guidance on when to use this tool versus alternatives like 'click' or 'press'. No mention of prerequisites (e.g., snapshot must exist) or when not to use it.

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