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Alchemy MCP Server

Alchemy MCP Server

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by alchemyplatform
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getBeaconBlockRewards

Retrieve the breakdown of Beacon block rewards including proposer, attestation, and sync committee rewards for any given block ID on Ethereum.

Instructions

Get the block rewards breakdown (proposer, attestation, sync committee) for a Beacon block

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "blockId": "<blockId>"
    },
    "name": "getBeaconBlockRewards"
  }
}

Input Schema

NameRequiredDescriptionDefault
networkNoNetwork ID. Call listSupportedNetworks for all options. e.g. "eth-mainnet", "base-mainnet"eth-mainnet
blockIdYesBlock ID: head, genesis, finalized, slot number, or 0x-prefixed block root

Schema Changelog

Changes observed during successful MCP inspections.

  1. Addedv0.1.5

TDQS

B3.3/5.0
Behavior2/5

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

With no annotations provided, the description bears full responsibility for disclosing behavioral traits. It only states 'Get the block rewards breakdown,' implying a read operation, but does not explicitly state it is read-only, non-destructive, or safe. No mention of permission requirements, rate limits, or side effects. The agent receives minimal behavioral context.

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?

The description is a single, concise sentence that front-loads the core purpose. Every part contributes meaning ('block rewards breakdown (proposer, attestation, sync committee)'). No redundant or verbose elements. Ideal length for quick comprehension.

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?

The tool is simple (2 params, no output schema), and the description explains the return value components. However, it lacks usage context (e.g., when to use this over getBeaconBlock or getBeaconBlockAttestations) and does not elaborate on the structure of each reward component. For a tool without an output schema, more detail about the response format would improve completeness.

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%, and both parameters have clear descriptions in the schema (network with examples, blockId with valid options). The description adds no additional parameter-level information but provides high-level context about the return value (the reward components). This is adequate but not exceptional, earning the baseline 3.

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?

The description clearly states the action ('Get the block rewards breakdown') and specifies the resource ('Beacon block'). It lists the reward components (proposer, attestation, sync committee), which distinguishes it from sibling tools like getBeaconBlock or getBeaconStateValidators. The verb+resource combination is precise.

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 is provided on when to use this tool versus alternatives (e.g., other beacon block endpoints). The description does not mention prerequisites or exclusions. For a tool that competes with many similar beacon-related getters, this omission leaves the agent without decision support.

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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