hedera_approve_token_allowance

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

Reveals that the result is unsigned ('Build (unsigned)'), implying it requires separate signing/submission. However, no annotations exist, and the description omits side effects, authorization requirements, or return structure.

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?

Single sentence, concise and front-loaded. No wasted words, but could accommodate slightly more detail without becoming verbose.

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?

With 5 parameters, no output schema, and no annotations, the description is insufficient. It lacks context on what the output is (unsigned transaction?), how to use the result, or prerequisites like token association. Incomplete for a moderately complex operation.

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 covers only 40% of parameters with descriptions (amount, ownerAccountId). Tool description adds no explanation for parameters like tokenId, spenderAccountId, or payerAccountId. The description solely states the tool's purpose without parameter details.

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 clearly that it builds an unsigned fungible-token allowance for a spender. Distinguishes from sibling hbar and NFT allowance tools by specifying 'fungible-token', but could be more explicit about building a transaction rather than executing.

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?

No guidance on when to use this tool versus alternatives like hedera_approve_hbar_allowance or hedera_approve_nft_allowance. Lacks conditions, exclusions, or prerequisites.

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