merge_cells_docx

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

With no annotations, the description carries the full behavioral burden but only explains the coordinate convention. It omits file_path/table_index requirements, whether merging is reversible, what happens to existing cell content, and any error behavior for a clearly mutating operation.

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 with no filler; the coordinate semantics are stated immediately. It is tight, though the terseness contributes to the parameter gaps rather than compensating for them.

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 return values need not be described, but for a 6-parameter mutating table tool with zero annotation coverage and 0% schema description coverage, the description is too thin on file/table targeting and behavioral caveats.

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 compensate. It usefully clarifies that the area spans [start_row, start_col] to [end_row, end_col] and is 0-indexed, but says nothing about file_path or table_index, leaving two required parameters unexplained.

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?

States a specific verb (merge) and resource (a cell area defined by start/end coordinates), which is clear enough to distinguish it from the many other table tools. It does not, however, name related siblings like split_table_docx or the surrounding file/table context, so differentiation is only partial.

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 gives no when-to-use guidance, no prerequisites, and no mention of alternatives or the inverse operation (split_table_docx). Usage must be inferred entirely from the name.

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