get_coin_by_id

A read tool on the REI Crypto MCP server.

SERVERREI Crypto MCP Server SOURCE0xreisearch/crypto-mcp-beta

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade B, identity unverified Pull the record →

This record as markdown: /tools/0xreisearch-crypto-mcp-beta/get-coin-by-id.md

WHAT IT DOES

What get_coin_by_id does on REI Crypto MCP Server

AI agents call get_coin_by_id to retrieve information from REI Crypto MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_coin_by_id is rated Low

The tool appears to fetch cryptocurrency coin data by identifier from integrated crypto data providers (DefiLlama Pro, CoinGecko Pro, Arkham Intelligence). This is a query/retrieval operation with no side effects, no code execution, no financial transactions, and no destructive capabilities. The naming pattern and server context strongly suggest read-only data access.

From the tool's definition Tool name 'get_coin_by_id' indicates a retrieval operation. Server description emphasizes 'data retrieval' without API key management. Sibling tools (get_active_users, get_balances_address, get_batch_historical_prices, etc.) are all read-only queries.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_coin_by_id safely

PolicyLayer is an MCP gateway: it sits between your AI agents and REI Crypto MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_coin_by_id, this is the rule to start with:

get_coin_by_id Allowed

get_coin_by_id is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_coin_by_id": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect REI Crypto MCP Server, apply this rule, and every get_coin_by_id call is checked against it from then on.

FAQ

Questions about get_coin_by_id

What does the get_coin_by_id tool do? +

get_coin_by_id is a read tool on the REI Crypto MCP Server MCP server. It is categorised as a Read tool in the REI Crypto MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_coin_by_id? +

Register the REI Crypto MCP Server MCP server in PolicyLayer and add a rule for get_coin_by_id: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches REI Crypto MCP Server. Nothing to install.

What risk level is get_coin_by_id? +

get_coin_by_id is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_coin_by_id? +

Yes. Add a rate_limit block to the get_coin_by_id rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block get_coin_by_id completely? +

Set action: deny in the PolicyLayer policy for get_coin_by_id. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides get_coin_by_id? +

get_coin_by_id is provided by the REI Crypto MCP Server MCP server (0xreisearch/crypto-mcp-beta). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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