Submit Proposal

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

The annotations are minimal and all false, so the description carries most of the behavioral burden. It adds important side-effect information: 'This will use Connects from your account' and 'Submitting proposals costs Connects.' It also documents the return value ('Confirmation with proposal ID and Connects used') despite no output schema. This goes beyond the structured fields.

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 well-structured with labeled Args, Returns, Examples, and Important sections, and the core purpose is front-loaded. It is slightly redundant (Connects costs are mentioned twice, and Args duplicates schema details), but the organization makes it easy for an agent to parse.

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 there is no output schema, the description appropriately documents the return value. It covers required parameters, optional parameters, examples for hourly and fixed bids, the Connects-cost side effect, and usage cautions. For a 7-parameter mutation tool with 100% schema coverage, this is a complete and actionable definition.

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 the schema already documents every parameter. The description's Args section mostly mirrors the schema (e.g., 'cover_letter (string, required): Your cover letter (50-5000 characters)' matches minLength/maxLength; 'bid in USD' matches the schema). It adds 'required' labels and examples, but little novel parameter meaning beyond the schema.

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 opens with 'Submit a proposal (application) for a job on Upwork' and says 'Apply to a job with your cover letter and bid.' This clearly identifies both the action and the resource being acted on. It also distinguishes itself from sibling tools like upwork_update_proposal and upwork_withdraw_proposal by using the verb 'submit' for new applications.

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 gives clear context: this is used when applying to an Upwork job with a cover letter and bid. It also advises reviewing job requirements and customizing the cover letter, which implies pre-invocation care. However, it does not explicitly contrast this tool with alternatives like update_proposal or withdraw_proposal, so it stops short of a 5.

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