text_text_joiner

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

No annotations provided, so description must carry the burden. It mentions custom separators and formats but does not disclose key behaviors like whether input is modified, handling of large inputs, edge cases, or if there are rate limits. The reference to describe_tool shifts responsibility away.

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 short (3 sentences) but includes redundant 'Menu ID: text_joiner' and 'Text Joiner' repetition. It is front-loaded with the main action. However, 'Use describe_tool' is a referral that could be omitted. Adequate but not exemplary.

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 no output schema and only a brief description, the tool definition is incomplete for autonomous selection. It relies heavily on the agent calling describe_tool for full guidance. For a tool with open schema, more detail on expected usage is needed.

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 no defined properties (only additionalProperties: true), meaning parameters are undefined. The description mentions 'custom separators' and 'formats' but does not clarify how to pass them (e.g., parameter names). Schema coverage is 100% trivially, but the description adds no meaningful parameter semantics.

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 clearly states the tool joins text lines/elements with custom separators and output formats like CSV, JSON, HTML. The verb 'join' and resource 'text' are specific, and it distinguishes from sibling text tools (e.g., case converter, line remover) by focusing on joining.

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 versus alternatives. Does not mention when not to use it, nor does it compare to other text manipulation tools in the sibling list. Also no mention of prerequisites or use cases.

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