Hash text with one of: md5, sha1, sha224, sha256, sha384, sha512.
AI agents call hash_text to retrieve information from Nexus Core without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Hashing is a deterministic, idempotent computational operation with no side effects on data. It neither creates, modifies, deletes, nor executes external code. While it performs computation, it falls under Read as a data transformation utility with no blast radius—misuse would only affect the hash output, not system state or external resources.
From the tool's definition Tool description states it 'Hash[es] text with one of: md5, sha1, sha224, sha384, sha512.' Hashing is a read-only cryptographic operation that produces output without modifying or deleting any data.
Attacks that exploit this kind of access
Hash text with one of: md5, sha1, sha224, sha256, sha384, sha512. It is categorised as a Read tool in the Nexus Core MCP Server, which means it retrieves data without modifying state.
Register the Nexus Core MCP server in PolicyLayer and add a rule for hash_text: 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 Nexus Core. Nothing to install.
hash_text 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 hash_text 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 hash_text. 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.
hash_text is provided by the Nexus Core MCP server (noumenon-ai/nexus-core). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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