confirm_ticket_purchase

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

Annotations already declare idempotentHint=true, openWorldHint=true, and destructiveHint=false, so the safety profile is covered. The description adds the useful behavioral claim that this is the sole completion gate, but says nothing about failure behavior, retry semantics, or that it hits the chain. Note the mild tension: the description reads like a read-only verification while readOnlyHint=false, though a state-marking confirmation step would explain the discrepancy.

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 short sentences, front-loaded with the verification scope and no filler. It is efficient, though the terseness contributes to the missing parameter and failure-behavior detail.

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 not be spelled out, and annotations cover much of the safety profile. However, for a 4-parameter tool with 0% schema coverage, the unexplained agent_id/execution_id and absent failure semantics leave meaningful gaps.

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% and the description explains no parameters at all. 'sender' loosely maps to wallet_address and 'receipt' to tx_hash, but agent_id and execution_id are entirely undocumented, and no format guidance (e.g., tx hash format, chain) is given.

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 (verify) plus the exact artifacts checked: Base receipt, sender, contract, method, and TicketPurchased event. This clearly separates it from prepare_ticket_purchase, though the description never explicitly says it confirms a ticket purchase outcome, leaving that to the tool 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?

"This is the only completion check" implies it is the terminal step after prepare_ticket_purchase, but the sequencing is only implied. There is no explicit statement of prerequisites (e.g., must a purchase be prepared first) or of what to do when verification fails.

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