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

Adds real behavior beyond the annotations: the link is one-time, expires in 15 minutes, must be shown to the user verbatim, and the file bypasses this chat into the user's own inbox. Annotations only state it is non-read-only and non-idempotent; the description explains the privacy path and expiry constraint the agent must convey.

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?

Front-loaded with the trigger condition and dense with actionable instruction; each sentence carries routing, expiry, or follow-up information. It runs long, but no sentence is filler.

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?

An output schema exists, so return values need not be spelled out, yet the description still tells the agent how to present upload_url and how to verify the result afterward. Nothing needed to invoke or relay this tool correctly is missing.

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%, so both parameters are already documented in the schema, including the 'never invent a title' constraint and the locale purpose. The description adds no further parameter syntax or semantics, so the baseline 3 applies.

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 resource (get a one-time upload link for a script) and distinguishes itself from siblings by naming the exact failure condition that routes here. An agent can tell it apart from send_to_blablabla and get_blablabla_inbox_status without opening a schema.

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?

Gives explicit trigger conditions ('this app cannot pass the file... or send_to_blablabla said no usable file arrived'), names the alternative for pasted text, and points to the follow-up tool with the needed identifier (get_blablabla_inbox_status with link_id). When-to-use, when-not, and lifecycle are all covered.

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