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refactor(mcp): centralize meta-function prefix predicates and fix list_tools pagination

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Implements T1 of plans/mcp-resources-prompts-design.md (§4.1, §4.6):

- Replace list_tools(None) with cursor-following list_all_tools() at the
  three call sites (start_server catalog build, catalog_items, describe)
  so paginating servers no longer silently lose tools past page one.
- Add MCP_READ/MCP_PROMPT prefix constants (declared nowhere yet; wired
  in T4/T7) plus centralized helpers MCP_META_FUNCTION_PREFIXES,
  is_mcp_meta_function, and mcp_meta_function_names.
- Mechanically replace every hand-rolled 3-prefix starts_with triple
  (partition in eval_tool_calls, 3 exclusion triples in
  select_enabled_functions, 3 inclusion triples + per-server name
  construction in select_enabled_mcp_servers) with the helpers,
  preserving the existing lax starts_with matching semantics and the
  mcp_invoke_* enablement sentinel (sentinel moves to search in T5).
- Behavior-neutral: dispatch chains keep their 3 arms, emission stays
  at exactly 3 meta-functions per server, existing tests unmodified.
- Add unit tests: helper classification, prefix-soundness property,
  lax-matching pin, ordered candidate-name construction.
This commit is contained in:
Dark-Alex-17
2026-08-25 11:37:41 -06:00
parent 7caa24d090
commit 01ada1da18
4 changed files with 92 additions and 74 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/config/request_context.rs
+10 -59
View File
@@ -23,8 +23,8 @@ use crate::function::{
user_interaction::USER_FUNCTION_PREFIX,
};
use crate::mcp::{
MCP_DESCRIBE_META_FUNCTION_NAME_PREFIX, MCP_INVOKE_META_FUNCTION_NAME_PREFIX,
MCP_SEARCH_META_FUNCTION_NAME_PREFIX, McpAuthReason, McpAuthRequired, is_auth_required_error,
MCP_INVOKE_META_FUNCTION_NAME_PREFIX, McpAuthReason, McpAuthRequired, is_auth_required_error,
is_mcp_meta_function, mcp_meta_function_names,
};
use crate::rag::Rag;
use crate::supervisor::Supervisor;
@@ -2011,11 +2011,7 @@ impl RequestContext {
.functions
.declarations()
.iter()
.filter(|v| {
!v.name.starts_with(MCP_INVOKE_META_FUNCTION_NAME_PREFIX)
&& !v.name.starts_with(MCP_SEARCH_META_FUNCTION_NAME_PREFIX)
&& !v.name.starts_with(MCP_DESCRIBE_META_FUNCTION_NAME_PREFIX)
})
.filter(|v| !is_mcp_meta_function(&v.name))
.map(|v| v.name.to_string())
.collect();
@@ -2025,11 +2021,7 @@ impl RequestContext {
.functions()
.declarations()
.iter()
.filter(|v| {
!v.name.starts_with(MCP_INVOKE_META_FUNCTION_NAME_PREFIX)
&& !v.name.starts_with(MCP_SEARCH_META_FUNCTION_NAME_PREFIX)
&& !v.name.starts_with(MCP_DESCRIBE_META_FUNCTION_NAME_PREFIX)
})
.filter(|v| !is_mcp_meta_function(&v.name))
.map(|v| v.name.to_string()),
);
}
@@ -2102,11 +2094,7 @@ impl RequestContext {
.declarations()
.to_vec()
.into_iter()
.filter(|v| {
!v.name.starts_with(MCP_INVOKE_META_FUNCTION_NAME_PREFIX)
&& !v.name.starts_with(MCP_SEARCH_META_FUNCTION_NAME_PREFIX)
&& !v.name.starts_with(MCP_DESCRIBE_META_FUNCTION_NAME_PREFIX)
})
.filter(|v| !is_mcp_meta_function(&v.name))
.collect();
if let Some(ref tool_names) = role_filter {
@@ -2155,11 +2143,7 @@ impl RequestContext {
.functions
.declarations()
.iter()
.filter(|v| {
v.name.starts_with(MCP_INVOKE_META_FUNCTION_NAME_PREFIX)
|| v.name.starts_with(MCP_SEARCH_META_FUNCTION_NAME_PREFIX)
|| v.name.starts_with(MCP_DESCRIBE_META_FUNCTION_NAME_PREFIX)
})
.filter(|v| is_mcp_meta_function(&v.name))
.map(|v| v.name.to_string())
.collect();
if let Some(agent) = &self.agent {
@@ -2168,12 +2152,7 @@ impl RequestContext {
.functions()
.declarations()
.iter()
.filter(|v| {
v.name.starts_with(MCP_INVOKE_META_FUNCTION_NAME_PREFIX)
|| v.name.starts_with(MCP_SEARCH_META_FUNCTION_NAME_PREFIX)
|| v.name
.starts_with(MCP_DESCRIBE_META_FUNCTION_NAME_PREFIX)
})
.filter(|v| is_mcp_meta_function(&v.name))
.map(|v| v.name.to_string()),
);
}
@@ -2190,39 +2169,15 @@ impl RequestContext {
let item_invoke_name =
format!("{}_{item}", MCP_INVOKE_META_FUNCTION_NAME_PREFIX);
let item_search_name =
format!("{}_{item}", MCP_SEARCH_META_FUNCTION_NAME_PREFIX);
let item_describe_name =
format!("{}_{item}", MCP_DESCRIBE_META_FUNCTION_NAME_PREFIX);
if let Some(values) = app.mapping_mcp_servers.get(item) {
server_names.extend(
values
.split(',')
.flat_map(|v| {
vec![
format!(
"{}_{}",
MCP_INVOKE_META_FUNCTION_NAME_PREFIX,
v.to_string()
),
format!(
"{}_{}",
MCP_SEARCH_META_FUNCTION_NAME_PREFIX,
v.to_string()
),
format!(
"{}_{}",
MCP_DESCRIBE_META_FUNCTION_NAME_PREFIX,
v.to_string()
),
]
})
.flat_map(mcp_meta_function_names)
.filter(|v| mcp_declaration_names.contains(v)),
)
} else if mcp_declaration_names.contains(&item_invoke_name) {
server_names.insert(item_invoke_name);
server_names.insert(item_search_name);
server_names.insert(item_describe_name);
server_names.extend(mcp_meta_function_names(item));
}
}
}
@@ -2251,11 +2206,7 @@ impl RequestContext {
.declarations()
.to_vec()
.into_iter()
.filter(|v| {
v.name.starts_with(MCP_INVOKE_META_FUNCTION_NAME_PREFIX)
|| v.name.starts_with(MCP_SEARCH_META_FUNCTION_NAME_PREFIX)
|| v.name.starts_with(MCP_DESCRIBE_META_FUNCTION_NAME_PREFIX)
})
.filter(|v| is_mcp_meta_function(&v.name))
.collect();
if let Some(ref server_names) = role_filter {