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

The readOnlyHint annotation already establishes the safety profile, and the description adds a genuinely useful behavioral claim beyond it: this server does NOT create transfers, so the agent should not look for a create counterpart. It does not, however, describe pagination behavior or result ordering.

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 tight sentences with no filler, and the read-only scoping note is front-loaded where it matters most. The 'Increase API: GET /check_transfers' fragment is slightly redundant with the tool name but cheap and orienting.

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 3-param, zero-required read tool with a fully covered schema and no output schema, the definition covers purpose, safety, and filtering adequately. Only minor gaps remain (pagination expectations, result shape).

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 100%, so limit, cursor, and account_id are fully documented in the schema. The description only restates the account filter ('Filter by account') and adds nothing about cursor/limit semantics, so the baseline of 3 is appropriate.

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+resource ('List check transfers') and pins down the exact API surface (GET /check_transfers), which cleanly separates it from the many sibling list tools (ach_transfers, wire_transfers, real_time_payments_transfers). The parenthetical also pre-empts confusion about a create counterpart.

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 'Filter by account' hint and the read-only framing imply when this tool is appropriate, but no alternative is named and no exclusion condition is stated. An agent can infer the resource-based routing from the name, but the description never says 'use increase_list_ach_transfers instead when X'.

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