diff --git a/Cargo.toml b/Cargo.toml
index ccd30be..2a00d00 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ resolver = "2"
 members = ["vgi", "vgi-example-worker", "vgi-storage-server"]
 
 [workspace.package]
-version = "0.8.0"
+version = "0.9.0"
 edition = "2021"
 rust-version = "1.90"
 license-file = "LICENSE"
diff --git a/vgi/src/catalog.rs b/vgi/src/catalog.rs
index c50628a..596e12d 100644
--- a/vgi/src/catalog.rs
+++ b/vgi/src/catalog.rs
@@ -317,6 +317,7 @@ fn apply_metadata(fi: &mut FunctionInfo, meta: &FunctionMetadata) {
     fi.null_handling = meta.null_handling.as_deref().map(enums::dict);
     fi.categories = meta.categories.clone();
     fi.examples = meta.examples.clone();
+    fi.tags = meta.tags.clone();
     if meta.projection_pushdown {
         fi.projection_pushdown = Some(true);
     }
diff --git a/vgi/src/function.rs b/vgi/src/function.rs
index 4ff9cea..811ad6f 100644
--- a/vgi/src/function.rs
+++ b/vgi/src/function.rs
@@ -190,6 +190,10 @@ pub struct FunctionMetadata {
     pub categories: Vec<String>,
     /// SQL usage examples surfaced in `FunctionInfo` for discovery.
     pub examples: Vec<FunctionExample>,
+    /// Arbitrary worker-set tags surfaced via `FunctionInfo.tags`
+    /// (`duckdb_functions().tags`), e.g. `vgi.columns_md` documenting a table
+    /// function's returned columns. Merged with any extension-derived tags.
+    pub tags: Vec<(String, String)>,
     /// Fixed scalar return type, when not computed dynamically at bind.
     pub return_type: Option<DataType>,
     pub projection_pushdown: bool,
@@ -221,6 +225,7 @@ impl Default for FunctionMetadata {
             null_handling: None,
             categories: Vec::new(),
             examples: Vec::new(),
+            tags: Vec::new(),
             return_type: None,
             projection_pushdown: false,
             filter_pushdown: false,