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

Annotations already declare readOnly/non-destructive/non-open-world, so the description's job is lighter; it adds meaningful context by stating the output is a shareable URL and that the payload carries no PII, which matters for what the agent may pass. It omits whether the link expires or what happens with an invalid `ref`, but the core behavioral profile is sound.

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?

Two short sentences with the purpose front-loaded and no filler. The trailing clause 'For chats without MCP submit' is compressed to the point of ambiguity, costing a point.

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 no output schema, the description correctly characterizes the return value as a shareable URL, which is the key missing piece otherwise. However, an agent still cannot confidently construct a call because `ref` is undefined and the nested `proposal` object's expected shape is unaddressed.

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 carry parameter meaning, and it only covers two of four: `proposal` and `task_summary` via 'proposal/summary prefilled'. The `ref` parameter is completely unexplained and `language` is only inferable from its enum.

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?

States a specific verb and artifact ('Build a shareable URL') plus the destination page and what is prefilled (proposal/summary), which is far more specific than the name alone. It does not name the sibling it replaces (e.g., request_free_first_task), so sibling differentiation is only implied by 'For chats without MCP submit.'

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?

'For chats without MCP submit' gives a use condition, but it is a terse fragment that assumes the agent knows what 'MCP submit' refers to and which sibling implements it. No explicit exclusions or named alternative are provided.

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