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

Annotations already declare the write/non-idempotent/open-world/non-destructive profile, so the burden is lower. The description adds the relay mechanism and the fact the ticket is an upload token held by the caller, but says nothing about what happens on success, duplicate/replayed tickets, size limits, or auth requirements.

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 sentences, no filler, with the action and caller constraint front-loaded. Every clause carries information an agent cannot get from the schema or annotations.

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?

For an internal widget-facing endpoint with no output schema, the critical fact (agents should not drive this) is stated plainly. It is nearly complete, missing only the success/failure response shape and how the ticket is obtained.

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 coverage is 0% for all three required params, so the description must compensate. It explains 'ticket' (the upload token the widget holds) and contextualizes 'base64' as the host-relayed payload, but leaves 'filename' undocumented beyond its self-evident name.

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 (receive) and resource (a file from the AILANG Parse upload widget) and further names the exact transport (base64 relay via host). It also pins the intended caller, which cleanly separates it from siblings like createUpload or mcpParse.

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?

"Only the widget calls this" is strong negative routing guidance: an agent reading this should conclude it is not the intended caller. No alternative tool is named for the case where an agent does want to upload, so it stops short of explicit alternative routing.

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