Get the hash of a specific Bitcoin block by its height. Use this to convert a block height to its corresponding block hash.
AI agents call blockhash_by_height_get to retrieve information from Satstream MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves immutable, public Bitcoin blockchain information (a block hash by height). It performs a simple lookup query without creating, modifying, deleting data, or executing code. The blast radius of misuse is minimal—an AI could retrieve block hashes repeatedly but cannot harm systems or data. Classification as Read is appropriate.
From the tool's definition Tool name and description indicate a query operation: 'Get the hash of a specific Bitcoin block by its height.' The action is read-only retrieval of publicly available blockchain data with no side effects, data modification, or execution capability.
Attacks that exploit this kind of access
Get the hash of a specific Bitcoin block by its height. Use this to convert a block height to its corresponding block hash. It is categorised as a Read tool in the Satstream MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Satstream MCP Server MCP server in PolicyLayer and add a rule for blockhash_by_height_get: 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 Satstream MCP Server. Nothing to install.
blockhash_by_height_get 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 blockhash_by_height_get 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 blockhash_by_height_get. 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.
blockhash_by_height_get is provided by the Satstream MCP Server MCP server (satstream/ss-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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