Web search restrictions after internal content (#1074)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>
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Peer HogeterpandThorsten Sommer authored and GitHub committed 2026-10-18 19:39:55 +02:00
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@@ -16,6 +16,6 @@ When adding, changing, or removing model-driven tools, keep these parts in sync:
Tool implementations must treat model-provided arguments as untrusted input. Validate settings and arguments, protect secrets with `SensitiveTraceArgumentNames`, use `ToolExecutionBlockedException` for intentional policy blocks, and check provider confidence before returning sensitive data to the model.
A tool which belongs to a preview feature returns false from `IToolImplementation.IsAvailable` while the preview is switched off; the registry then leaves it out of every list, every request, and the token count, so no component has to check that preview for the tool. Every tool declares in `IToolImplementation.OutboundData` where its arguments go: a chat which read from a mailbox keeps the tools whose data goes further than the mailbox allows from being offered and from running, see `ToolSelectionRules.IsOutboundDataAllowed`. A tool which brings content of a mailbox into the chat raises `ToolExecutionResult.RequiredOutboundDataRestriction`, next to `RequiredProviderConfidence` and `RequiredDataSecurity`. "Searching Mailboxes" in `documentation/Tools.md` explains the mail tools.
A tool which belongs to a preview feature returns false from `IToolImplementation.IsAvailable` while the preview is switched off; the registry then leaves it out of every list, every request, and the token count, so no component has to check that preview for the tool. Every tool declares in `IToolImplementation.OutboundData` where its arguments go: a chat which holds internal content, such as mails, a search of the wiki, or an internal web page, keeps the tools whose data goes further than its restriction allows from being offered and from running, see `ToolSelectionRules.IsOutboundDataAllowed`. A tool which brings internal content into the chat raises `ToolExecutionResult.RequiredOutboundDataRestriction`, next to `RequiredProviderConfidence` and `RequiredDataSecurity`, names the source in its `OutboundDataOrigin`, and tells the model beforehand that it may end web search, worded by `WebSearchFirstRule`. "Outbound Data Restrictions" in `documentation/Tools.md` explains the sources and the levels, and "Searching Mailboxes" there the mail tools.
A tool which offers itself from the context of a chat instead of being selected, such as `semantic_search`, sets `Activation = ToolActivation.CONTEXT` and tailors its function to each request in `ResolveFunctionAsync`.