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

Annotations already disclose that this is a non-readonly, non-destructive, non-idempotent mutation. The description adds useful behavioral context by clarifying that submission is not approval and that business workflow approvals always apply, though it does not spell out duplicate-submission or non-idempotency implications.

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 purpose and the key 'does not approve' caveat are front-loaded in two compact sentences. The final sentence about configurable MCP approval requirements is relevant but slightly organization-specific context rather than core invocation guidance.

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 explained, and annotations cover the safety profile. However, for a mutation with a nested input object and 0% schema description coverage, the description omits parameter-level guidance, leaving the agent dependent on the bare schema.

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% and the single parameter is a nested object with required entityId plus optional notes and entityType. The description only implies that an existing bid ID is needed and says nothing about notes or the entityType default, so it does not compensate for the schema's lack of parameter documentation.

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 uses a specific verb and resource: 'Submit an existing bid to the configured business approval flow.' It also explicitly distinguishes itself from approval-decision tools by stating 'Does not approve it,' so an agent can tell it apart from sibling operations like decide_bid_approval_request.

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?

Usage is implied: use this when an existing bid needs to enter the approval workflow. The description says it does not approve, which rules out the decision path, but it does not name the alternative sibling tool or state prerequisites such as the bid being in a submittable state.

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