WebML CG Teleconference – 11 December 2025 - 15:00-16:00 UTC

Latest version: https://github.com/webmachinelearning/meetings/blob/main/telcons/2025-12-11-cg-agenda.md


WebML CG Teleconference – 11 December 2025 - 15:00-16:00 UTC
<https://github.com/webmachinelearning/meetings/blob/main/telcons/2025-12-11-cg-agenda.md#webml-cg-teleconference--11-december-2025---1500-1600-utc>
See the timezone table ...
🤝 Logistics
<https://github.com/webmachinelearning/meetings/blob/main/telcons/2025-12-11-cg-agenda.md#-logistics>

  *   Chair: Anssi
  *   Scribe: Anssi
  *   IRC: irc://irc.w3.org:6667/#webmachinelearning

  *   IRC web client: https://irc.w3.org/?channels=#webmachinelearning

  *   Zoom joining instructions: internal-webmachinelearning<https://lists.w3.org/Archives/Member/internal-webmachinelearning/2023Jun/0000.html>
  *   Minutes: https://www.w3.org/2025/12/11-webmachinelearning-minutes.html


🤖 WebMCP API
<https://github.com/webmachinelearning/meetings/blob/main/telcons/2025-12-11-cg-agenda.md#-webmcp-api>

Tip

Explainers WebMCP main<https://github.com/webmachinelearning/webmcp/blob/main/README.md> | service workers<https://github.com/webmachinelearning/webmcp/blob/main/docs/service-workers.md> | declarative<https://github.com/webmachinelearning/webmcp/pull/26>

API proposal<https://github.com/webmachinelearning/webmcp/blob/main/docs/proposal.md> | Security and Privacy Considerations<https://github.com/webmachinelearning/webmcp/blob/main/docs/security-privacy-considerations.md>

Early implementation<https://github.com/MiguelsPizza/WebMCP> experience<https://github.com/jasonjmcghee/WebMCP>

In this meeting we will follow up on TPAC 2025 topics to chart our path forward.

Communication with the TAG
<https://github.com/webmachinelearning/meetings/blob/main/telcons/2025-12-11-cg-agenda.md#communication-with-the-tag>

Discuss any new feedback from the TAG. Identify actionable next steps.

  *   ⨀ webmachinelearning/webmcp#35<https://github.com/webmachinelearning/webmcp/issues/35>
  *   ✅️ Resolution<https://www.w3.org/2025/11/11-webmachinelearning-minutes.html#224c>

Privacy & security considerations
<https://github.com/webmachinelearning/meetings/blob/main/telcons/2025-12-11-cg-agenda.md#privacy--security-considerations>

Initial security and privacy considerations established. Discuss the remaining attack vectors that need to be considered.

  *   ⨀ webmachinelearning/webmcp#45<https://github.com/webmachinelearning/webmcp/issues/45>
  *   ☰ Security and Privacy Considerations<https://github.com/webmachinelearning/webmcp/blob/main/docs/security-privacy-considerations.md>
  *   ✅️ Resolution<https://www.w3.org/2025/11/11-webmachinelearning-minutes.html#8e39>

Managing action specific permissions
<https://github.com/webmachinelearning/meetings/blob/main/telcons/2025-12-11-cg-agenda.md#managing-action-specific-permissions>

Discuss a threat model to evaluate the role of browser mediated consent for tool execution.

  *   ⨀ webmachinelearning/webmcp#44<https://github.com/webmachinelearning/webmcp/issues/44>
  *   ✅️ Resolution<https://www.w3.org/2025/11/11-webmachinelearning-minutes.html#8e39>

Declarative approach, new developer feedback and implementation experience
<https://github.com/webmachinelearning/meetings/blob/main/telcons/2025-12-11-cg-agenda.md#declarative-approach-new-developer-feedback-and-implementation-experience>

Discuss developer feedback and implementation experience from Technical University of Darmstadt, and related work on a new declarative framework.

  *   ⛙ webmachinelearning/webmcp#26<https://github.com/webmachinelearning/webmcp/pull/26>
  *   ☰ Paper: https://arxiv.org/abs/2511.11287v1

  *   ☰ Code: https://github.com/svenschultze/VOIX


Define the API for in-page Agents to use a site's declared tools
<https://github.com/webmachinelearning/meetings/blob/main/telcons/2025-12-11-cg-agenda.md#define-the-api-for-in-page-agents-to-use-a-sites-declared-tools>

Review and discuss the proposed ModelContextClient interface and its use cases.

  *   ⨀ webmachinelearning/webmcp#51<https://github.com/webmachinelearning/webmcp/issues/51>
  *   ✅️ Resolution<https://www.w3.org/2025/11/11-webmachinelearning-minutes.html#92cd>

Should we support cross-origin Agents across frame boundaries
<https://github.com/webmachinelearning/meetings/blob/main/telcons/2025-12-11-cg-agenda.md#should-we-support-cross-origin-agents-across-frame-boundaries>

Discuss the proposal to allow only the top-level browsing context to declare tools in v1 and make tool declaration from within an iframe a v2 feature.

  *   ⨀ webmachinelearning/webmcp#52<https://github.com/webmachinelearning/webmcp/issues/52>
  *   ⨀ webmachinelearning/webmcp#57<https://github.com/webmachinelearning/webmcp/issues/57>
  *   📝 Minutes<https://www.w3.org/2025/11/11-webmachinelearning-minutes.html#39d8>

WebMCP API explainer-to-spec transition
<https://github.com/webmachinelearning/meetings/blob/main/telcons/2025-12-11-cg-agenda.md#webmcp-api-explainer-to-spec-transition>

Discuss the plan to transition from the WebMCP explainer to a Community Group spec draft.