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

With no annotations, the description must carry behavioral weight, and it does supply the required auth scope ("Requires reporting:read (or account:read)") plus a note that output is JSON and includes normalized labels and USD hints. It omits pagination, ordering, and result limits, which matter for a timeline endpoint, so the behavioral picture is only partly drawn.

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 sentence leads with the resource and purpose, then packs the output traits, the optional filter, and the auth requirement. It is dense but front-loaded with zero filler, though the colon-list of output traits is a bit compressed.

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 two-parameter list tool with no annotations and no output schema, the description covers content, scope, and auth, which is the essentials. It stops short of ordering, pagination, or time-range behavior, so the definition is adequate rather than complete.

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 100%, so the schema already documents both parameters, and the description only restates that walletId narrows to one vault. The category parameter is left entirely to the schema. This is the expected baseline when the schema does the work.

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 names a specific resource and framing: a "Treasury activity timeline (JSON) for reconciliation" with normalized labels, USD hints, vault scope, and categories. That is clearly more than a restatement of the name, but it never distinguishes itself from the nearby list_audit_log or other list_* siblings, so an agent cannot tell from the text alone which of the two activity logs to call.

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?

It gives an implied purpose ("for reconciliation") and a narrowing rule for walletId, which helps an agent decide to call it when reconciling vault activity. However, it never states when to prefer list_audit_log or list_wallets, nor any exclusions, so the usage is only implied through its intended purpose.

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