set_capability_manifest

SERVERMeridian SOURCE@meridianmcp/mcp

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/io-github-ajc3xc-meridian/set-capability-manifest.md

WHAT IT DOES

What set_capability_manifest does on Meridian

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

Parameter	Type	Required	Description
`project_id`	string	—
`capabilities`	array	Yes	The full manifest — replaces whatever is currently stored.
`project_name`	string	—	Project name — an alternative to project_id; resolved to the id internally. project_id wins if both are given.

Parameters from the server's own tool schema.

RISK

Why set_capability_manifest is rated Medium

This tool creates or modifies persistent project configuration (capability manifest) in a way that overwrites prior state. While the operation is technically reversible (can be called again with different data), it is not a simple metadata update—it replaces an entire manifest structure that governs project capabilities and tool availability. The 'REPLACES' language indicates overwrite semantics.

From the tool's definition Tool description states 'Persist a project's structured capability manifest' and 'REPLACES the existing manifest wholesale (not a merge)', indicating it modifies configuration data irreversibly at the project level.

Risk signalsHigh parameter count (10 properties)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_capability_manifest safely

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

set_capability_manifest Rate-limited

set_capability_manifest 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": {
    "set_capability_manifest": {
      "limits": [
        {
          "counter": "set_capability_manifest_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 Meridian, apply this rule, and every set_capability_manifest call is checked against it from then on.

FAQ

Questions about set_capability_manifest

What does the set_capability_manifest tool do? +

[SUPPORT] 649e095f — Persist a project's structured capability manifest: a list of capability declarations, each with id, purpose, required_tools (non-empty list of tool/server names), optional fallback_chain, optional provenance (string or object), availability_policy ('required'|'optional'|'degraded_ok', default 'required'), and an optional verification_command. REPLACES the existing manifest wholesale (not a merge). Rejects deterministically with {error} on any unknown/missing field, duplicate capability id, secret-shaped value, or machine-local absolute path — manifests are shared, multi-machine project state, never a place for secrets or one executor's local filesystem layout. Normalizes to a stable, sorted-by-id order so the same capability set always hashes identically regardless of input order. Persistent-state disclosure: on hosted Meridian, supplied text and project/session metadata are sent to and stored in Meridian's service; self-hosted deployments keep them in the configured local SQLite/Postgres database. This data is visible in the dashboard/API and later project context or handoffs. Delete individual tasks, notes, or decisions where supported, or delete the project/account using the documented controls. Do not include secrets. It is categorised as a Write tool in the Meridian MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does set_capability_manifest accept? +

set_capability_manifest accepts 3 parameters: project_id, capabilities, project_name. Required: capabilities. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on set_capability_manifest? +

Register the Meridian MCP server in PolicyLayer and add a rule for set_capability_manifest: 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 Meridian. Nothing to install.

What risk level is set_capability_manifest? +

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

Can I rate-limit set_capability_manifest? +

Yes. Add a rate_limit block to the set_capability_manifest 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 set_capability_manifest completely? +

Set action: deny in the PolicyLayer policy for set_capability_manifest. 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 set_capability_manifest? +

set_capability_manifest is provided by the Meridian MCP server (@meridianmcp/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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