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tool macro expands to serde_json without re-export #487
Description
Describe the bug
tool macro expands to serde_json here which causes compilation error in crates that don't have it as a dependency.
To Reproduce
Steps to reproduce the behavior:
- cargo new asdf
- cd asdf
- cargo add rcmp -F macros
- add basic tool call to src/main.rs
struct A;
#[rmcp::tool_router]
impl A {
#[rmcp::tool]
async fn foo() {}
}- error[E0433]: failed to resolve: use of unresolved module or unlinked crate
serde_json
Proposed solution
Other location in the macro already assumes the downstream crate depends on rmcp, so expanding the macro to use the re-exported ::rmcp::serde_json::... should work.
Activity
alexhancock commentedon Feb 27, 2026
@jonaro00 would you have time to submit a PR for the proposed solution?
kakarot-dev commentedon Mar 9, 2026
@alexhancock i have submitted a pr for this! Please check #735
Thank you!
fix(rmcp-macros): use re-exported serde_json path in task_handler (#735)