Call Quai Contract (Read-Only)

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

Annotations already indicate readOnlyHint and openWorldHint, but the description adds significant behavior beyond them: it never spends gas, never requires a key, simulates without broadcasting state-changing calls, and returns decoded results. This is rich, non-redundant context that helps the agent predict side effects.

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 description is front-loaded with the core purpose, then the required inputs, then behavioral caveats and the alternative. Every sentence adds value; there is no filler or repetition of schema content beyond what is necessary for clarity.

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 read-only call tool with 5 parameters and no output schema, the description covers purpose, input requirements, behavior, limitations, and the alternative tool. It even notes that state-changing calls are simulated rather than broadcast, which fully prepares the agent for expected outcomes.

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 the baseline is 3, but the description adds meaningful guidance: it tells the user to provide the address, an ABI fragment array containing at least the method, the method name, and arguments. It also clarifies that zone resolution is automatic, which indirectly explains the network parameter's role.

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 states a specific verb and resource: 'Perform a read-only call (an eth_call equivalent) against a deployed EVM contract on Quai Network and return the decoded result.' It distinguishes itself from siblings by explicitly contrasting with the not-yet-available send_transaction tool and clarifying it cannot change state.

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 description gives explicit when-to-use guidance: it works for view/pure methods and simulates state-changing ones, but cannot change on-chain state. It names the alternative tool (send_transaction) for state changes, and notes the zone is resolved automatically so users don't need a zone-resolution step.

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