notebook_merge_cells

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

No annotations are provided, so the description carries full burden. It states the merge operation but does not disclose what happens to cell contents, metadata, or the second cell after merging. There is no mention of side effects, data destruction, or error conditions, leaving significant behavioral ambiguity.

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 sentence of 10 words with no filler. It is front-loaded and every word carries meaning. This is an example of ideal conciseness for a simple operation.

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?

For a mutation tool with no output schema, the description lacks crucial details: what happens to cell content (concatenation? overwriting?), whether cell types must match, error scenarios (e.g., invalid index, last cell), and any side effects on metadata. The description is too terse to fully guide an agent.

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 100% (both parameters have descriptions). The tool description adds no additional meaning beyond the schema—it rephrases 'first cell to merge' which is already in the property description. Baseline score 3 is appropriate since the schema sufficiently documents parameters.

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 'Merges a cell with the cell immediately following it' uses a specific action verb ('merges') and clearly identifies the resource (cell). It distinguishes this tool from siblings like notebook_split_cell, notebook_move_cell, and notebook_duplicate_cell by specifying the adjacent merging behavior.

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 provides no guidance on when to use this tool versus alternatives such as splitting or moving cells. It does not mention prerequisites (e.g., cell types must be compatible) or when merging is not advisable. The usage context is completely absent.

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