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getBeaconStateSyncCommittees

Fetch sync committee assignments for a specified beacon state, with optional epoch filter, to identify validators serving as sync committee members.

Instructions

Get sync committee assignments for a given state and optional epoch

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
networkNoNetwork ID. Call listSupportedNetworks for all options. e.g. "eth-mainnet", "base-mainnet"eth-mainnet
stateIdYesState ID: head, genesis, finalized, slot, or state root
epochNoEpoch number to filter by
Behavior2/5

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

No annotations are provided, so the description carries full burden. It only states 'Get', implying a read operation, but lacks details on permissions, rate limits, side effects, or data sensitivity. Minimal behavioral insight beyond the obvious.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence, front-loaded with verb and resource, no filler words. Efficient and clear for its purpose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No output schema exists, and the description does not explain return format, pagination, or error behavior. For a state query tool, it is minimally adequate but leaves gaps for an agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so each parameter already has a description. The tool description adds no extra meaning beyond restating the parameters (state and optional epoch). Baseline 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description uses specific verb 'Get' and resource 'sync committee assignments', clearly distinguishing it from sibling tools like getBeaconStateCommittees which likely return different data. It concisely states the operation and parameters.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

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 such as getBeaconStateCommittees or other beacon tools. The description does not provide context for selection or exclusions.

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

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