update_table_cell

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

With no annotations present, the description must disclose behavioral traits. It reveals that the tool 'overwrites all existing rich text segments', which is a key destructive behavior. However, it does not mention permission requirements, rate limits, or what happens on invalid input. The disclosure is minimal but not misleading.

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 efficiently structured: a one-line summary followed by three clear argument descriptions. Every sentence contributes value, and there is no unnecessary text. Ideal conciseness.

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 the tool's simplicity (3 parameters, no nested objects) and the presence of an output schema (so return values need not be described), the description is mostly complete. It could mention that row_id must be a valid existing block, but overall it covers the core semantics adequately.

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?

The input schema has 0% description coverage, but the description compensates by clearly explaining each parameter: row_id is a 'table_row block ID', cell_index is 'zero-based', and new_text is 'plain-text content' that overwrites existing rich text. This adds significant meaning beyond the raw schema types.

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 starts with a clear verb ('Replace') and singular resource ('a single cell in a table row'), making the tool's purpose immediately obvious. It effectively distinguishes from siblings like 'update_block_text' (which targets block-level text) and 'insert_table_row' (which adds rows).

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 usage instructions for the arguments but gives no guidance on when to use this tool versus alternatives, nor any prerequisites or exclusions. The agent receives no contextual advice for tool selection.

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