UDA attaching a descriptor-level _meta object to a @tool, @resource,
or @resourceTemplate-annotated method (the MCP _meta field on Tool,
Resource, ResourceTemplate). The supplied JSON must be an object; it is
emitted verbatim as the descriptor's _meta.
UDA attaching a descriptor-level _meta object to a @tool, @resource, or @resourceTemplate-annotated method (the MCP _meta field on Tool, Resource, ResourceTemplate). The supplied JSON must be an object; it is emitted verbatim as the descriptor's _meta.