// SCAN REPORT

Pharo Smalltalk Interop

23 tools. 8 can modify or destroy data without limits.

8 write tools that can modify data. Rate limits recommended.

Last updated: 12 Jun 2026

8 can modify or destroy data

15 read-only

23 tools total

Community server · catalogue entry verified 12/06/2026

How to control Pharo Smalltalk Interop ↓

TOOL MAP

What Pharo Smalltalk Interop exposes to your agents

Read (15) Write / Execute (8) Destructive / Financial (0)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

High Risk

The most dangerous Pharo Smalltalk Interop tools

Execute · High run_class_test Running tests in a live Pharo image can trigger side effects (code modification, data changes, external calls) depending on what those tests do. Execute · High run_package_test This tool triggers code execution within the Pharo image (test code). Execute · High install_project The name 'install_project' strongly implies installing or loading a project into the Pharo image, which would execute code and modify the running environment. Execute · Critical eval The tool name 'eval' on a server designed to communicate with a local Pharo Smalltalk image almost certainly executes arbitrary Smalltalk code.

8 of Pharo Smalltalk Interop's 23 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control Pharo Smalltalk Interop

PolicyLayer is an MCP gateway — it sits between your AI agents and Pharo Smalltalk Interop, and nothing reaches the server without passing your rules. These are the rules we recommend:

Rate limit write operations

{
  "apply_settings": {
    "limits": [
      {
        "counter": "apply_settings_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "get_class_comment": {
    "limits": [
      {
        "counter": "get_class_comment_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register Pharo Smalltalk Interop — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON PHARO SMALLTALK INTEROP →

Free to start. No card required.

FULL CATALOGUE

All 23 Pharo Smalltalk Interop tools

EXECUTE 5 tools

Execute run_class_test run_class_test Execute run_package_test run_package_test Execute eval eval Execute eval_code eval_code Execute install_project install_project

WRITE 3 tools

Write apply_settings apply_settings Write export_package export_package Write import_package import_package

READ 15 tools

Read get_class_comment get_class_comment Read get_class_source get_class_source Read get_method_source get_method_source Read get_settings get_settings Read list_classes list_classes Read list_extended_classes list_extended_classes Read list_methods list_methods Read list_packages list_packages Read read_screen read_screen Read search_classes_like search_classes_like Read search_implementors search_implementors Read search_methods_like search_methods_like Read search_references search_references Read search_references_to_class search_references_to_class Read search_traits_like search_traits_like

EXPLORE

Related servers

Other MCP servers with similar tools — same risk classification, starter policies for each.

FAQ

Questions about Pharo Smalltalk Interop

How do I prevent bulk modifications through Pharo Smalltalk Interop? +

The Pharo Smalltalk Interop server has 3 write tools including apply_settings, export_package, import_package. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach Pharo Smalltalk Interop.

How many tools does the Pharo Smalltalk Interop MCP server expose? +

23 tools across 3 categories: Execute, Read, Write. 15 are read-only. 8 can modify, create, or delete data.

How do I enforce a policy on Pharo Smalltalk Interop? +

Register the Pharo Smalltalk Interop MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every Pharo Smalltalk Interop tool call.

Deterministic rules across all 23 Pharo Smalltalk Interop tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON PHARO SMALLTALK INTEROP →

Free to start. No card required.

23 Pharo Smalltalk Interop tools catalogued and risk-classified — across an index of 43,000+ MCP servers.