sdjwt_issue

SERVERAinumbers Mcp Apps SOURCEpostoaklabs/ainumbers-mcp-apps

Medium RISK CLASS

Category Write

Parameters 31 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/postoaklabs-ainumbers-mcp-apps/sdjwt-issue.md

WHAT IT DOES

What sdjwt_issue does on Ainumbers Mcp Apps

AI agents use sdjwt_issue to create or update resources in Ainumbers Mcp Apps, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ainumbers Mcp Apps environment.

Parameter	Type	Required	Description
`claims`	object	Yes	Claim key-value pairs to issue (required, at least one entry).
`subject`	string	—	sub claim. Default: "subject-001".
`selective_keys`	array	—	Top-level claim keys marked selectively disclosable. Keys not listed stay always-disclosed cleartext.

Parameters from the server's own tool schema.

RISK

Why sdjwt_issue is rated Medium

This tool creates and signs JWT tokens with cryptographic material (EdDSA signatures, ephemeral DIDs). While described as 'read-only, no auth, zero PII', the act of issuing cryptographic credentials is a Write operation that creates new data artifacts that could be used maliciously—e.g., to forge credentials or enable unauthorized claims presentation if the signing key were compromised or the tool misused.

From the tool's definition Issues a Selective Disclosure JWT (RFC 9901) from a claims object...Signed EdDSA over a fresh ephemeral did:key (generated per call, not reused)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs sdjwt_issue safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Ainumbers Mcp Apps, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sdjwt_issue, this is the rule to start with:

sdjwt_issue Rate-limited

sdjwt_issue stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sdjwt_issue": {
      "limits": [
        {
          "counter": "sdjwt_issue_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Ainumbers Mcp Apps, apply this rule, and every sdjwt_issue call is checked against it from then on.

FAQ

Questions about sdjwt_issue

What does the sdjwt_issue tool do? +

Issues a Selective Disclosure JWT (RFC 9901) from a claims object, marking selected top-level claim keys as selectively disclosable via salted-hash digests in the _sd array. Signed EdDSA over a fresh ephemeral did:key (generated per call, not reused). Pair with sdjwt_present to build a redacted presentation from the returned sd_jwt. It is categorised as a Write tool in the Ainumbers Mcp Apps MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does sdjwt_issue accept? +

sdjwt_issue accepts 3 parameters: claims, subject, selective_keys. Required: claims. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on sdjwt_issue? +

Register the Ainumbers Mcp Apps MCP server in PolicyLayer and add a rule for sdjwt_issue: 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 Ainumbers Mcp Apps. Nothing to install.

What risk level is sdjwt_issue? +

sdjwt_issue is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit sdjwt_issue? +

Yes. Add a rate_limit block to the sdjwt_issue 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.

How do I block sdjwt_issue completely? +

Set action: deny in the PolicyLayer policy for sdjwt_issue. 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.

What MCP server provides sdjwt_issue? +

sdjwt_issue is provided by the Ainumbers Mcp Apps MCP server (postoaklabs/ainumbers-mcp-apps). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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