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

Adds substantial behavior beyond the annotations: the call is a staged request that has no effect until human approval and a follow-up execute_approved_action, and it cannot touch payment/status fields. This materially shapes agent planning around a destructiveHint=true tool. It does not say whether omitted fields are preserved or cleared, which matters for a destructive edit.

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?

Four compact sentences with the core action and scope limit front-loaded, followed by the approval mechanics. The trailing sentence about administrator-configurable MCP approvals versus business workflow approvals is slightly redundant but still informative.

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 no explanation, and the approval gate is well covered. However, for a nested 11-field update payload with 0% schema descriptions, the absence of any field-level guidance leaves the agent guessing what can actually be edited.

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% across 3 parameters, and the nested 'data' object carries 11 undocumented fields with strict patterns (filePath regex, amount format, date formats). The description never mentions bidId, invoiceId, or which fields 'details and attachments' maps to, so it fails to compensate for the coverage gap.

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 ('Edit') and resource ('invoice details and attachments') and adds a real scope boundary: 'without payment/status overrides'. An agent knows the operation and its limits. It never names which sibling handles the excluded payment/status changes, so the differentiation is incomplete.

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 clear context ('working with RetailHardHat invoices records') plus the critical routing rule: nothing happens until a human approves in Settings > MCP and execute_approved_action is invoked. That tells the agent when this call is only step one. It does not point at alternatives such as submit_invoice_approval_request or update_bid for other paths.

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