validate_formula_syntax

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

Beyond the readOnlyHint annotation, the description clarifies that only syntax is validated and the formula is not applied, which adds meaningful behavioral context. It does not mention return values or error behavior, but with annotations already covering safety, this is sufficient.

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, front-loaded sentence with no wasted words. It directly states the action and a crucial qualifier, making it highly concise and well-structured.

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's purpose is clear and the readOnlyHint annotation provides safety context, but the lack of parameter descriptions and any output behavior information leaves gaps. Given the simplicity of the tool, the description is minimally adequate but not complete.

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 description does not describe any of the four required parameters (filepath, sheet_name, cell, formula). With 0% schema description coverage, the agent must rely solely on parameter names, which is insufficient for correct invocation.

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 'validate' with the resource 'Excel formula syntax' and adds a key qualifier 'without applying it', clearly distinguishing it from sibling tools like apply_formula. The purpose is unambiguous and precise.

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 phrase 'without applying it' provides clear context for when to use this tool (to check syntax without side effects). However, it does not explicitly name alternative tools or state when not to use it, falling short of the full explicit guidance standard.

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