validate_formula_syntax

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

With no annotations, the description must carry the full burden. It states the core behavior (validate without applying) and mentions parameter preferences, but does not disclose what happens on invalid syntax (e.g., error or return value) or whether the tool modifies anything (it doesn't, but that's implied).

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 concise with a front-loaded main sentence and a well-structured parameter list using clear labels and a note. Every sentence adds value, and there is no wasted text.

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 complexity (5 parameters, sibling tools, and an output schema exists), the description covers the purpose and parameters adequately but misses context like prerequisites (e.g., workbook must be open) or edge-case behavior. It is minimally complete but not rich.

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 schema has no parameter descriptions (0% coverage), but the description adds meaningful context: sheet_name is a worksheet name, cell is an address like 'A1', formula is to validate, session_id from open_workbook is preferred, and filepath is deprecated. This compensates well for the schema gap.

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 explicitly states 'Validate Excel formula syntax without applying it,' which clearly identifies a specific verb (validate) and resource (Excel formula syntax). It also distinguishes itself from sibling tools like 'apply_formula' by noting it does not apply the formula.

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 no guidance on when to use this tool versus alternatives, such as when to validate syntax vs. apply a formula or other operations. The note about session_id vs filepath is about parameter preference, not tool selection.

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