Cross-Wiki Reach
Explanation
Cross-wiki reach decides how much of a farm one MCP endpoint can see. It is a grant made on the source endpoint, which is what makes its consequences surprising: it is not a setting of the wikis being reached, and those wikis cannot refuse it through their own MCP configuration.
Defaults
- The main wiki's endpoint reaches the whole farm.
- A subwiki's endpoint sees only its own wiki.
- A main-wiki administrator can grant reach to a subwiki, or revoke it from the main wiki, from the farm dashboard.
A source-side grant
A reach-enabled endpoint can search and read a target wiki even where that target wiki's own MCP endpoint is disabled, because the request is served by the source endpoint:
The target's tool selection and space filter do not apply to it either. Two things still constrain reach:
- The acting user's rights on the target wiki.
- The source endpoint's own space filter.
So disabling a wiki's endpoint does not hide that wiki from other endpoints. Where a wiki must never be reachable, control it with user rights on that wiki and grant no endpoint reach over it.
The farm dashboard
The main wiki's MCP administration section lists every wiki of the farm with:
- Wiki: the wiki's name.
- MCP enabled: editable by an administrator of that wiki, shown read-only otherwise.
- Cross-wiki reach: editable only by main-wiki administrators.
- Configure: a link to that wiki's own MCP administration section.
