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

With no annotations, the description carries the full behavioral burden. 'Save' implies a mutation, but it does not disclose whether this upserts or replaces an existing account, whether prior bank details are overwritten, what auto_approve_enabled does, or what permissions are required. This is a significant gap for a write tool.

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?

A single front-loaded sentence that wastes no words and puts the resource and purpose immediately. Its brevity borders on under-specification, but as a structural matter it is clean.

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 a 6-parameter mutation tool with no annotations, no output schema, and 83% of parameters undocumented, the description is far too thin. An agent cannot confidently call this tool without guessing at the meaning of product_id and the two optional config parameters.

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 only 17%, so the description is expected to compensate and does not: it explains none of the 6 parameters, including the non-obvious product_id, alert_source_emails, and auto_approve_enabled. Only account_number is described, and that is in the schema, not the description.

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 ('Save') and resource ('merchant bank account') plus the business purpose ('receive bank-transfer payments'), which lets an agent distinguish it from siblings like set_payment_config or save_alert_sources. It lacks an explicit naming of a sibling it is not, so it falls short of a 5.

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?

There is no guidance on when to call this versus alternatives such as set_payment_config or assign_bank_credit, nor any prerequisite or exclusion. The agent must infer usage entirely from the one-line purpose.

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