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Advanced: attach session policy

runtime_session_policy

[advanced/internal] Attach allow rules on an already-open raw session (allow_slugs / allow_ops). Policy overlay — not open and not exec. Identity remains Aziel Eliab. Use this when an already-open session needs tighter allow_slugs / allow_ops before exec. Do not use it for executing an op or opening a session; use runtime_session_exec or runtime_session_open (prefer fraggate_call, which applies defaults) instead. Write: mutates session policy only. A sealed session refuses session_closed (409). Expired sessions refuse session_expired (410). Missing both session_id and id fails before the door runs. Does not exec and does not mint a new id. session_id or id (aliases) required. allow_slugs / allow_ops replace the allow overlay when sent; omit them to leave the current lists. max_payload_bytes and kv_increment are optional overlays, not exec payload. Nested policy{} is accepted as the same overlay. Mutation requires confirm=true (runtime gate) or dry_run=true (preview only, no write). confirm and dry_run stay optional on inputSchema.required. dry_run still returns FG-HALLUC-TOOL, FG-STUB, FG-UNKNOWN-OP, or FG-LOCAL-ONLY when a confirm call would refuse. confirm is consent, not tenant auth, and it does not upgrade shared public-demo isolation. Returns updated session policy plus a policy receipt.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idNoAlias of session_id. The door accepts either key; do not send two different values.
confirmNoDocumented confirmation flag. Optional in inputSchema.required (connector refresh must not break). tools/call still refuses MCP-CONFIRM-REQUIRED when confirm is missing or false unless dry_run=true. confirm is consent to run the call. It is not tenant auth and it does not upgrade shared public-demo isolation.
dry_runNoOptional preview flag. When true, do not write and do not stamp a ledger tip. Allowlist, hallucination, stub, and local-only checks still run and return the same FragGate refuse code a confirm call would get. MCP-DRY-RUN is returned only when that call would have been allowed to proceed. confirm is consent, not tenant auth, and it does not upgrade shared public-demo isolation.
allow_opsNoOptional replacement allowlist of ops this session may exec. Omit to keep the current list.
session_idYesRequired. Raw session id from runtime_session_open (sess_ + 32 lowercase hex). Alias: id. Missing both fails with session_id required; unknown id returns session_not_found.
allow_slugsNoOptional replacement allowlist of catalog slugs this session may exec. Omit to keep the current list.
kv_incrementNoOptional. When true, allow KV increment side effects on later exec. Not an increment itself.
max_payload_bytesNoOptional max payload size in bytes for later exec (integer 1..1048576). Overlay only; not the exec body. Out of range refuses bad_policy.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
codeNoFragGate or fabric code when present: FG-OK, FG-HALLUC-TOOL, FG-STUB, FG-LOCAL-ONLY, FG-UNKNOWN-OP, FG-GATE-REFUSE, FG-LAMB-REFUSE, or a module refuse such as MESH-* / AKM-*.
doorNoDoor name. The public door is fraggate.
ran_inNoExecution locale (for example aziel-runtime) when present.
resultNoPolicy body: updated session allow lists and a policy receipt. Refuses session_id required, session_not_found, session_closed, session_expired.
statusNoHTTP-like status when present on wrappers (200 ok; 400+ error / refuse).
displayNoHuman-facing envelope. Show display.action, title, and summary, then take the next input. Never echo raw tool names.
receiptNoOptional receipt, ledger tip, or TemporalLock/ForgeReceipts exit when the door stamped one.
refusalNoExplicit refuse object, code, or message when the door or engine refused.
engine_opNoResolved engine op when present (often inside result).
ledger_tipNoAsk/refuse ledger tip when the door stamped one.
provenanceNoProvenance / input packet when the pipeline attached one.
session_idNoRaw session id when session plumbing was used. Hidden unless the user asked for the chain.
engine_slugNoResolved engine slug when present (often inside result).
limitationsNoCapability limitations or Remain-OFF notes when present.
engine_digestNo64-hex engine_digest when a true in-process engine ran (often inside result).

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed5 schema fields changed
    • changedOutput schema / description
      Previous value: -"Display envelope shown to the user (display.title / display.summary) plus the machine result. Extra engine fields may appear."New value: +"Display envelope shown to the user (display.action / display.title / display.summary) plus the machine result. Extra engine fields may appear. Do not echo raw tool names."
    • changedOutput schema / properties / display / description
      Previous value: -"Human-facing envelope. Show title and summary, then take the next input."New value: +"Human-facing envelope. Show display.action, title, and summary, then take the next input. Never echo raw tool names."
    • addedOutput schema / properties / display / properties / action
      Added value: +{
      +  "description": "Human-visible run frame. Always \"Run aziel runtime\". Product verb titles stay on title. Not a tool name.",
      +  "type": "string"
      +}
    • addedOutput schema / properties / display / properties / image
      Added value: +{
      +  "additionalProperties": true,
      +  "description": "Present only when a real production included png_b64, jpeg_b64 (or the same byte family), or a cited http(s) image URL. No invented thumbs. Omitted on dry_run. reviewed is true only when executed production bytes are attached; a dry_run never mints reviewed.",
      +  "properties": {
      +    "data": {
      +      "description": "Base64 image bytes copied from the production. Omitted for a URL-only cite. Never present on dry_run.",
      +      "type": "string"
      +    },
      +    "mimeType": {
      +      "description": "Sniffed image media type (image/png, image/jpeg, image/webp, or image/gif).",
      +      "type": "string"
      +    },
      +    "reviewed": {
      +      "description": "True only when data came from an executed production. False for a URL cite without bytes. Never true on dry_run.",
      +      "type": "boolean"
      +    },
      +    "source": {
      +      "description": "Production field the image was taken from (for example png_b64, jpeg_b64, or image_url).",
      +      "type": "string"
      +    },
      +    "url": {
      +      "description": "Cited http(s) image URL when the production named one. Not invented.",
      +      "type": "string"
      +    }
      +  },
      +  "type": "object"
      +}
    • changedOutput schema / properties / display / properties / title / description
      Previous value: -"Short result title for the AI client."New value: +"Product verb title for the AI client. Not a raw tool name."
  2. Changed2 schema fields changed
    • changedInput schema / properties / confirm / description
      Previous value: -"Documented confirmation flag. Optional in inputSchema.required (connector refresh must not break). tools/call still refuses MCP-CONFIRM-REQUIRED when confirm is missing or false unless dry_run=true (preview, no write)."New value: +"Documented confirmation flag. Optional in inputSchema.required (connector refresh must not break). tools/call still refuses MCP-CONFIRM-REQUIRED when confirm is missing or false unless dry_run=true. confirm is consent to run the call. It is not tenant auth and it does not upgrade shared public-demo isolation."
    • changedInput schema / properties / dry_run / description
      Previous value: -"Optional preview flag. When true, return a would-mutate preview and do not write. Alternative to confirm=true. Does not mutate."New value: +"Optional preview flag. When true, do not write and do not stamp a ledger tip. Allowlist, hallucination, stub, and local-only checks still run and return the same FragGate refuse code a confirm call would get. MCP-DRY-RUN is returned only when that call would have been allowed to proceed. confirm is consent, not tenant auth, and it does not upgrade shared public-demo isolation."
  3. First observed

TDQS

A4.8/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Discloses much more than the sparse annotations: 'mutates session policy only,' 'Does not exec and does not mint a new id,' sealed sessions return 409, expired sessions return 410, and dry_run returns specific refuse codes. This gives the agent a precise behavioral model.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is dense and runs as one long paragraph, but it is front-loaded with action and usage before behavioral details. Some redundancy exists (e.g., confirm semantics also appear in schema descriptions), yet the length is largely justified by the tool's complexity.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Covers when to use, when not to use, error cases, dry_run behavior, confirm requirements, return value ('Returns updated session policy plus a policy receipt'), and parameter overlay semantics. With an output schema present, no critical information is missing for an agent to invoke this correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so baseline is 3. The description adds meaning beyond the schema by explaining overlay semantics: 'allow_slugs / allow_ops replace the allow overlay when sent; omit them to leave the current lists,' and 'max_payload_bytes and kv_increment are optional overlays, not exec payload.' Also notes nested policy{} is accepted.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific action and resource: 'Attach allow rules on an already-open raw session (allow_slugs / allow_ops).' It also distinguishes itself from siblings by explicitly saying 'Policy overlay — not open and not exec,' making its role clear.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides explicit when-to-use guidance: 'Use this when an already-open session needs tighter allow_slugs / allow_ops before exec.' It names alternatives and exclusions: 'Do not use it for executing an op or opening a session; use runtime_session_exec or runtime_session_open (prefer fraggate_call...) instead.'

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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