Merge Cells Horizontally

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

Annotations provide no readOnlyHint or destructiveHint, so description must convey behavioral traits. It only says 'merge', implying modification, but lacks details on side effects, required cell adjacency, or handling of invalid indices.

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?

Single sentence, no extraneous content. Efficient and front-loaded.

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?

Tool has 5 required parameters, no output schema, and minimal annotations. Description omits return value, error conditions, and edge cases (e.g., non-existent row/columns). Inadequate for correct invocation.

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 has 5 parameters with 0% description coverage. Description does not explain any parameter semantics, e.g., indexing scheme, valid ranges, or row/column constraints. Agent relies solely on parameter names.

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?

Description clearly states specific verb ('merge') and resource ('cells horizontally in a single row'), distinguishing it from siblings like 'merge_table_cells_vertical' and generic 'merge_table_cells'.

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 vs alternatives, no prerequisites or exclusions mentioned. The description only states what it does, not when or why.

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