format-excel-range-fill

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

Annotations declare destructiveHint=true and readOnlyHint=false, but the description adds no further context about behavioral effects, such as whether the existing fill is replaced, what happens if no color is provided, or whether the confirm gate applies. It does not supplement the annotation-provided safety profile.

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 very short and front-loaded, stating the core action in the first sentence. However, the tip is somewhat redundant with the main sentence, and the extreme brevity sacrifices important context, such as usage alternatives and behavioral details.

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 that this is a potentially destructive mutation tool with many sibling formatting tools, the description is insufficient. It does not explain consequences, how it interacts with the confirm gate, or when to prefer it over other formatting tools. The agent lacks guidance on critical decisions.

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 88%, so parameters like color, address, driveId, etc. are already well-documented in the schema. The description adds no parameter-level meaning beyond what the schema provides, so the baseline score of 3 is appropriate.

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 and resource ('Format an Excel range fill') and the tip clarifies that 'fill' means the background fill color. It distinguishes this from other formatting tools like format-excel-range-font and format-excel-range-border, though not explicitly by name.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention that this should be used specifically for setting background fill color as opposed to font or border formatting, nor does it note any exclusions or prerequisites. The tip is a restatement, not a usage guideline.

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