Merge Cells Vertically

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

Annotations are minimal (only title). The description does not disclose behavioral traits such as what happens to cell content during merge, whether the merge is destructive, or any constraints (e.g., only works on contiguous rows). For a writing operation, this lack of transparency is a significant gap.

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 extremely concise (one short sentence), but it lacks critical information that would justify its brevity. It is not well-structured in terms of front-loading key details, missing parameter explanations and usage context.

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?

With five required parameters (all undocumented), no output schema, and no behavioral annotations, the description is severely incomplete. It fails to provide sufficient context for correct invocation, leaving the AI agent to guess parameter semantics and outcomes.

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%, and the description provides no explanation for any of the five required parameters (filename, table_index, col_index, start_row, end_row). The AI agent has no semantic guidance on column indexing (0-based/1-based), row range bounds, or file naming conventions.

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 precisely states the action (merge cells) and the scope (vertically in a single column). It clearly distinguishes from sibling tools like merge_table_cells_horizontal and merge_table_cells, which cover different merge directions or scopes.

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 is provided on when to use this tool versus alternatives. The sibling tools include merge_table_cells and merge_table_cells_horizontal, but the description does not mention their existence or specify when vertical merging is appropriate.

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