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

Annotations are empty, so the description carries the full behavioral burden. It implies a safe read ('List all...') but discloses nothing about auth requirements beyond a bare api_key mention, pagination, result size, or whether the list is filtered per account.

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 same idea is stated twice ('List all the system supported blockchains' / 'List all the supported blockchains'), and the text is padded with raw JSDoc tags and a near-useless '@return: a json object'. The redundancy and formatting waste space without adding information.

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 trivial one-parameter list tool this is roughly adequate: it names the resource and says entries yield blockchain_fk values. But with no output schema, the vague 'a json object' return note leaves the actual response shape underspecified.

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%, so the description must compensate. It partially does with '@param api_key: The api key allocated to your application,' which adds meaning the bare schema lacks, but the single required parameter is documented only at the level of an API-key label.

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 and resource ('List all the system supported blockchains') and clarifies the unit of the response ('a list of blockchain_fk values'). This is clear enough to distinguish it from most siblings, though it does not explicitly name competing tools like crypto_digitalassets or currency_crypto.

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?

There is no when-to-use guidance and no named alternatives. The phrase 'for later use' hints at a workflow (fetch blockchain_fk before calling other tools) but never states the condition that selects this tool over siblings, leaving the agent to infer it.

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