Return the decoded display value and raw value bytes for one parsed ASN.1 node.
AI agents call asn1_node_value to retrieve information from PKI Studio MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and decodes information from an already-parsed ASN.1 structure without creating, modifying, deleting, or executing anything. It is a read-only query that extracts display values and raw bytes from certificate/key data, consistent with the 'Read' category (search, list, get, fetch).
From the tool's definition Tool description states it returns 'the decoded display value and raw value bytes for one parsed ASN.1 node' — a pure retrieval operation with no modification or execution of commands.
Attacks that exploit this kind of access
Return the decoded display value and raw value bytes for one parsed ASN.1 node. It is categorised as a Read tool in the PKI Studio MCP MCP Server, which means it retrieves data without modifying state.
Register the PKI Studio MCP server in PolicyLayer and add a rule for asn1_node_value: 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 PKI Studio MCP. Nothing to install.
asn1_node_value 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 asn1_node_value 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 asn1_node_value. 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.
asn1_node_value is provided by the PKI Studio MCP server (pkistudio/pkistudiomcp). 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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