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

In the absence of annotations, the description carries the full burden and discloses key behavioral traits: broadcasting to the blockchain, verification of permissions after broadcast, and authentication requirement. It could additionally discuss reversibility or failure handling, but the provided details go well beyond minimal disclosure.

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 three sentences, each contributing meaningful information: primary action, verification behavior, and usage context. There is no redundancy or fluff, and the most critical information is front-loaded.

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 tool with no output schema and a nested transaction object, the description covers the essential workflow: build, sign, broadcast, and verify. It omits return format and error scenarios, but the additional context signals (siblings, schema) fill enough gaps to make the tool understandable. A slightly lower score would be warranted if the tool had more complex side effects.

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?

The schema already provides 100% parameter descriptions, so the baseline is 3. The description adds value by tying 'signedTransaction' to the output of 'build_permission_transaction', clarifying its origin and expected structure beyond the schema's generic 'from tronWeb.trx.sign()' text.

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 verb ('Broadcast'), the resource ('signed AccountPermissionUpdate transaction'), and the target ('TRON blockchain'). It also distinguishes itself from the sibling 'broadcast_transaction' by specifying the transaction type and by describing post-broadcast verification, making its unique purpose unambiguous.

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?

Explicitly instructs 'Use this after signing the transaction from build_permission_transaction', providing a clear when-to-use directive and linking to the proper workflow. This effectively differentiates it from the transaction-building sibling and gives actionable sequencing guidance.

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