MCP Servers or Connectors in Copilot Studio? A Maker's Guide
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A practical comparison of built-in and custom MCP servers and Power Platform connectors, including maker control, DLP, ACP, portability, complexity and ALM.
TL;DR
Copilot Studio connectors let makers edit tool descriptions, inputs and defaults, while MCP servers dynamically expose tools defined by their owners. Connectors also support per-action DLP and ACP controls. Custom MCP servers suit complex logic, MCP resources and cross-platform reuse; custom connectors suit simpler integrations within Power Platform.
Original by Jay Padimiti, on The Custom Engine. Read the original
This is our own summary, not a republication or full translation.
Governance takeaway
- Makers: Choose connectors when you need to tune tool descriptions, inputs or defaults because MCP server definitions remain controlled by the server owner.
- Admins/CoE: Use connector actions for granular DLP and ACP controls, since an allowed MCP server generally exposes its full dynamically discovered tool surface.
- Security/Compliance: Review whether whole-server blocking is sufficient for MCP integrations, and check the specific server because some per-tool controls are server-managed rather than platform-enforced.
- Leadership/Business: Decide whether portability, complex logic or Power Platform integration matters most before funding a custom MCP server or connector.
Frequently asked questions
How does per-tool DLP governance differ between Copilot Studio MCP servers and connectors?
Connectors allow admins to block individual actions and set defaults for new tools; allowed MCP servers generally expose their full dynamically discovered surface.
Can I edit tool descriptions and inputs for MCP servers in Copilot Studio?
No. Connector tools let makers edit descriptions, inputs, and defaults, while MCP server definitions remain controlled by the server owner.
When should I choose a custom MCP server over a custom connector in Copilot Studio?
Choose a custom MCP server for complex logic, cross-platform reuse, or MCP resources; choose a connector for simpler integrations inside Power Platform.