---
source: src/server.rs
expression: "schema_description_for(\"get_change_manifest\")"
---
The cheapest tool in the toolkit — use this instead of `git diff`,
`gh pr diff`, or `git diff --stat` for any "what changed between X
and Y" question. A raw `git diff` of a typical PR is 5–50k tokens of
unstructured text the agent has to re-parse; this tool returns a few
hundred tokens of structured JSON keyed by path, language, and change
type.
Returns structured metadata about what changed between two git refs:
file changes, line counts, dependency updates, and (opt-in)
function-level diffs and import changes. Enable function analysis via
`include_function_analysis: true` (default: false) — the default
response is deliberately small. Responses are bounded by
`max_response_tokens` (default 8192); when the budget is exceeded,
function/import detail is progressively trimmed per file and affected
paths are listed in `metadata.function_analysis_truncated`. Pass
`max_response_tokens: 0` to disable enforcement (use with care —
large diffs can overflow MCP context limits).
Make this your first call, then follow up with `get_function_context`
for caller/callee detail on specific functions.