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

With no annotations, the description carries full burden. It does add behavioral context: 'Confirm (yes/no) before executing' indicates a confirmation step, and the parameter docs clarify that amount is scaled by decimals and destination is an external blockchain address. However, it does not warn about irreversibility, fees, or required balance, which are important for a spend operation.

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 contains redundancy: the first sentence is repeated verbatim after the confirmation note. The parameter documentation is verbose but necessary, and the @return is useless ('a json object'). The repetition wastes space and disrupts front-loading.

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?

The tool has 7 parameters, no annotations, and an output schema exists. The description covers all parameters and some behavioral context (confirmation), but lacks important operational context for a financial operation: irreversibility, fees, balance requirements, or possible errors. It is adequate as a parameter reference but not fully complete for safe usage.

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 compensates excellently by explaining all 7 parameters. It clarifies that account_fk is a database ID not an address, asset_id can be found via /crypto/digitalassets, amount is scaled by 10^decimals, and destination is a blockchain address not an internal account address. This adds significant meaning beyond the schema types.

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 clearly states the action: 'Spends a digital asset to a destination blockchain address.' This is a specific verb+resource+destination. However, it does not explicitly differentiate from siblings like account_send or crypto_swap, but the mention of 'blockchain address' distinguishes it from internal transfers.

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 usage context is implied by the description: you would use this tool when you need to spend a digital asset to a blockchain address. However, there are no explicit alternatives, scenarios, or exclusions mentioned. The description lacks guidance on when not to use it or which sibling tool might be more appropriate.

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