lookup_hash
Hash a string (md5/sha1/sha256). Pass ?text=...&algo=... as query. Use for checksum and integrity agents. Example call: {"query_string": "text=hello&algo=sha256"} Cost: $0.005–$0.05 USDC on Base per call.
This record as markdown: /tools/io-github-colinhughes2121-gocreative-agent-api/lookup-hash.md
What lookup_hash does on GoCreative Agent API
AI agents call lookup_hash to retrieve information from GoCreative Agent API without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
query_string | string | — |
Parameters from the server's own tool schema.
Why lookup_hash is rated Low
Hashing is a deterministic, side-effect-free cryptographic computation that retrieves/derives a value from input data. It does not create, modify, delete, or execute code/commands. While hashing can be part of security workflows, the tool itself is purely computational and read-like in nature—it generates derived data without altering state.
From the tool's definition Tool description states 'Hash a string (md5/sha1/sha256)' with stated use case 'for checksum and integrity agents'.
Attacks that exploit this kind of access
The rule that runs lookup_hash safely
PolicyLayer is an MCP gateway: it sits between your AI agents and GoCreative Agent API, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For lookup_hash, this is the rule to start with:
lookup_hash 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 GoCreative Agent API, apply this rule, and every lookup_hash call is checked against it from then on.
Questions about lookup_hash
Hash a string (md5/sha1/sha256). Pass ?text=...&algo=... as query. Use for checksum and integrity agents. Example call: {"query_string": "text=hello&algo=sha256"} Cost: $0.005–$0.05 USDC on Base per call. It is categorised as a Read tool in the GoCreative Agent API MCP Server, which means it retrieves data without modifying state.
lookup_hash accepts 1 parameter: query_string. The full parameter table on this page comes from the server's own tool schema.
Register the GoCreative Agent API MCP server in PolicyLayer and add a rule for lookup_hash: 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 GoCreative Agent API. Nothing to install.
lookup_hash 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 lookup_hash 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 lookup_hash. 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.
lookup_hash is provided by the GoCreative Agent API MCP server (https://api.gocreativeai.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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