Decode DER, BER, PEM, HEX, or base64 input and return round-trip re-encoded ASN.1 bytes.
AI agents call normalize_asn1_input 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 performs data parsing and format conversion operations only. While it manipulates data in memory to normalize ASN.1 structures, it does not write to persistent storage, delete data, or execute external commands. The round-trip re-encoding is a reversible transformation for display/analysis purposes. This is consistent with Read category tools that retrieve or transform data without side effects.
From the tool's definition The tool description states it decodes various input formats (DER, BER, PEM, HEX, base64) and returns re-encoded ASN.1 bytes. The action is parsing/decoding data with no modification to stored data or triggering of external operations.
Attacks that exploit this kind of access
Decode DER, BER, PEM, HEX, or base64 input and return round-trip re-encoded ASN.1 bytes. 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 normalize_asn1_input: 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.
normalize_asn1_input 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 normalize_asn1_input 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 normalize_asn1_input. 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.
normalize_asn1_input 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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