# proj_get_differences

A read tool on the Eda Agent MCP server.

Agent View of the PolicyLayer registry record for `proj_get_differences`. HTML page: https://policylayer.com/tools/eda-agent/proj-get-differences

## Facts

- Tool: `proj_get_differences`
- Server: Eda Agent (`salitronic/eda-agent`) — https://policylayer.com/tools/eda-agent.md
- Homepage: https://github.com/salitronic/eda-agent
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "proj_get_differences",
    "arguments": {}
  }
}
```

## Why proj_get_differences is rated Low

This tool appears to retrieve or compute differences between project versions or states, which is consistent with Read category operations (search, list, get, fetch). While the empty description reduces confidence slightly, the naming convention 'get_' combined with the context of an Altium Designer automation server suggests it performs a comparison query rather than executing commands, modifying data, or causing…

From the tool's own definition: "Tool name 'proj_get_differences' indicates a query or retrieval operation that compares project states. The 'get_' prefix strongly suggests data retrieval without modification."

## Use case

AI agents call proj_get_differences to retrieve information from Eda Agent without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Eda Agent:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "proj_get_differences": {}
  }
}
```

## Other tools on Eda Agent (344)

- `lib_uninstall_library` — Destructive — https://policylayer.com/tools/eda-agent/lib-uninstall-library.md
- `obj_batch_delete` — Destructive — https://policylayer.com/tools/eda-agent/obj-batch-delete.md
- `obj_delete` — Destructive — https://policylayer.com/tools/eda-agent/obj-delete.md
- `pcb_clear_source_footprint_library` — Destructive — https://policylayer.com/tools/eda-agent/pcb-clear-source-footprint-library.md
- `pcb_delete_design_rule` — Destructive — https://policylayer.com/tools/eda-agent/pcb-delete-design-rule.md
- `pcb_delete_invalid_objects` — Destructive — https://policylayer.com/tools/eda-agent/pcb-delete-invalid-objects.md
- `pcb_delete_net` — Destructive — https://policylayer.com/tools/eda-agent/pcb-delete-net.md
- `pcb_delete_object` — Destructive — https://policylayer.com/tools/eda-agent/pcb-delete-object.md
- `pcb_remove_layer` — Destructive — https://policylayer.com/tools/eda-agent/pcb-remove-layer.md
- `pcb_remove_teardrops` — Destructive — https://policylayer.com/tools/eda-agent/pcb-remove-teardrops.md
- `proj_delete_sheet` — Destructive — https://policylayer.com/tools/eda-agent/proj-delete-sheet.md
- `proj_remove_document` — Destructive — https://policylayer.com/tools/eda-agent/proj-remove-document.md
- `app_attach` — Execute — https://policylayer.com/tools/eda-agent/app-attach.md
- `app_run_menu` — Execute — https://policylayer.com/tools/eda-agent/app-run-menu.md
- `design_execute_plan` — Execute — https://policylayer.com/tools/eda-agent/design-execute-plan.md
- `design_validate` — Execute — https://policylayer.com/tools/eda-agent/design-validate.md
- `design_validate_plan` — Execute — https://policylayer.com/tools/eda-agent/design-validate-plan.md
- `obj_refresh_document` — Execute — https://policylayer.com/tools/eda-agent/obj-refresh-document.md
- `obj_run_process` — Execute — https://policylayer.com/tools/eda-agent/obj-run-process.md
- `obj_switch_view` — Execute — https://policylayer.com/tools/eda-agent/obj-switch-view.md
- `obj_zoom` — Execute — https://policylayer.com/tools/eda-agent/obj-zoom.md
- `pcb_build_from_project` — Execute — https://policylayer.com/tools/eda-agent/pcb-build-from-project.md
- `pcb_panelize` — Execute — https://policylayer.com/tools/eda-agent/pcb-panelize.md
- `pcb_plan_placement` — Execute — https://policylayer.com/tools/eda-agent/pcb-plan-placement.md
- `pcb_run_drc` — Execute — https://policylayer.com/tools/eda-agent/pcb-run-drc.md
- `pcb_scale` — Execute — https://policylayer.com/tools/eda-agent/pcb-scale.md
- `pcb_start_polygon_placement` — Execute — https://policylayer.com/tools/eda-agent/pcb-start-polygon-placement.md
- `pcb_tune_length` — Execute — https://policylayer.com/tools/eda-agent/pcb-tune-length.md
- `proj_compile` — Execute — https://policylayer.com/tools/eda-agent/proj-compile.md
- `proj_force_recompile` — Execute — https://policylayer.com/tools/eda-agent/proj-force-recompile.md
- …and 314 more: https://policylayer.com/tools/eda-agent.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=eda-agent · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/eda-agent