update_payment_method

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

No annotations are supplied, so the description carries the full behavioral burden, yet it says nothing about optimistic concurrency (the sync_token), whether the update is a partial merge or a full replace, which fields are mutable, or what error results from a stale token. It only confirms this is a mutation of an existing record, which the name already implies.

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 single sentence is front-loaded and free of waste, but that brevity comes at the cost of under-specification rather than efficiency. There is nothing structurally wrong with it; there is simply very little in it.

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 mutation tool with no annotations, no output schema, and a nested params object, the description leaves out concurrency requirements, mutability scope, and failure behavior. An agent could call it, but only by inferring the sync_token contract entirely from the 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?

Top-level schema coverage is reported at 0%, though the nested properties (id, name, active, sync_token) do carry short schema descriptions. The description adds no meaning beyond those schema strings, and it never explains the required id/sync_token pairing or that name and active are optional updates.

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 and resource ("Update an existing payment method") and names the product domain (QuickBooks Online), so the agent knows exactly what the tool acts on. It does not, however, differentiate itself from siblings such as create_payment_method, get_payment_method, or search_payment_methods beyond the verb in the name.

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 use this tool versus create_payment_method or search_payment_methods, and no mention of prerequisites such as needing an existing record or a current sync_token. The word "existing" is the only implicit hint that the record must already be present.

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