This record as markdown: /tools/0xreisearch-crypto-mcp-beta/search.md
What search does on REI Crypto MCP Server
AI agents call search 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.
Why search is rated Low
The search tool performs a query operation (GET request) to retrieve data from crypto APIs. It has no side effects, does not modify or delete data, and does not execute arbitrary code or commit financial transactions. This is a straightforward Read operation with low risk even if misused by an AI agent, as it merely returns information without capability to cause harm.
From the tool's definition Tool named 'search' with GET endpoint description indicates a retrieval operation. Context shows this server provides 'API access to DefiLlama Pro, CoinGecko Pro, and Arkham Intelligence for crypto data retrieval' with sibling tools including…
Attacks that exploit this kind of access
The rule that runs search 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 search, this is the rule to start with:
search is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect REI Crypto MCP Server, apply this rule, and every search call is checked against it from then on.
Questions about search
GET /search. It is categorised as a Read tool in the REI Crypto MCP Server MCP Server, which means it retrieves data without modifying state.
Register the REI Crypto MCP Server MCP server in PolicyLayer and add a rule for search: 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.
search is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the search 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.
Set action: deny in the PolicyLayer policy for search. 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.
search 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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