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fix: emit cache hints from handler macros (#1120)

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Dale Seo 2026-08-05 10:20:08 -04:00 • committed by GitHub
commit 07bcda2973
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1 changed files with 120 additions and 6 deletions
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10
crates/rmcp-macros/src/tool_handler.rs
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@ -66,15 +66,19 @@ pub fn tool_handler(attr: TokenStream, input: TokenStream) -> syn::Result<TokenS
async fn list_tools(
&self,
_request: Option<rmcp::model::PaginatedRequestParams>,
_context: rmcp::service::RequestContext<rmcp::RoleServer>,
context: rmcp::service::RequestContext<rmcp::RoleServer>,
) -> Result<rmcp::model::ListToolsResult, rmcp::ErrorData> {
let supports_cache_hints = context.protocol_version().is_some_and(|version| {
version >= rmcp::model::ProtocolVersion::V_2026_07_28
});
Ok(rmcp::model::ListToolsResult{
result_type: Some(rmcp::model::ResultType::COMPLETE),
tools: #router.list_all(),
meta: #result_meta,
next_cursor: None,
ttl_ms: None,
cache_scope: None,
ttl_ms: supports_cache_hints.then_some(0),
cache_scope: supports_cache_hints
.then_some(rmcp::model::CacheScope::Public),
})
}
})?;