excel_read_range

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

Annotations already declare readOnlyHint=true, so the description's 'read' adds no behavioral context. No mention of return format behavior (JSON vs markdown) or handling of empty cells. With a simple description, it fails to disclose non-obvious behaviors that annotations don't cover.

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, efficient sentence. However, it is slightly under-specified; conciseness should not sacrifice completeness. Still, it is well-formed and front-loaded with the key action.

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's simplicity and the presence of annotations (read-only) and parameter schema (with enum for format), the description is moderately complete. However, it lacks explicit mention of how the response is returned (e.g., as structured data) and does not address edge cases like invalid ranges. With no output schema, more context about return values 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 75%, meaning most parameters are already described in the schema. The description does not add any additional meaning to the parameters; it merely restates the action. The responseFormat parameter's purpose (to control output format) is not elaborated.

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 'Read a specific range of cells' uses a specific verb and resource, clearly distinguishing it from siblings like excel_read_sheet (whole sheet) and excel_read_workbook (whole workbook). The word 'specific' emphasizes that it reads a subset.

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 on when to use this tool versus alternatives. It doesn't mention any preconditions, limitations, or when to prefer excel_read_sheet or excel_read_workbook. The description implies usage only for reading a specific range, but lacks explicit context.

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