Add Text At Tail

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the operation is additive ('Adds text') and returns True on success, but it does not disclose whether the operation modifies the original file in place, whether it creates a new file, whether it requires specific permissions, or what happens if the range is invalid. For a mutation tool with zero annotation coverage, this 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 a single sentence that is reasonably concise and front-loads the core action. It includes the return value, which is useful. It could be slightly more structured by separating the return value, but it is not verbose or wasteful.

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 has 4 parameters, no annotations, and no schema descriptions, the description is incomplete. It does not explain the behavior of optional parameters like 'worksheet' and '_range', nor does it describe the output schema beyond 'Returns True'. An agent would need to guess or inspect other tools to understand how to specify the range and worksheet. The output schema exists but the description does not leverage it to explain return values.

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 explains the purpose of 'text' and '_range' implicitly ('text to the end of each text cell within a specified range'), but it does not clarify the meaning of 'worksheet' (e.g., required or optional, default behavior) or the format of '_range' (e.g., 'A1:B2' vs. named range). With 4 parameters and no schema descriptions, the description only partially compensates.

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 states a specific verb ('Adds'), a resource ('text to the end of each text cell'), and a scope ('within a specified range of a worksheet in an Excel file'). It is clear what the tool does. However, it does not explicitly differentiate from sibling tools like add_text_at_head, add_text_before_text, or add_text_after_text, though the 'end' wording implies the distinction.

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 implies usage: it is for appending text to cells in a range. It does not explicitly state when to use this tool versus alternatives like add_text_at_head or add_text_before_text, nor does it mention any exclusions or prerequisites. The context is clear enough for an agent to infer the primary use case, but no explicit guidance is given.

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