Shorten FeatureFlagIssueFieldsMultiSelect doc comment

Match the style of the other flag constants in this file.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: owenniblock

pkg/github/feature_flags.go

@@ -17,17 +17,7 @@ const FeatureFlagIFCLabels = "ifc_labels"
 const FeatureFlagFileBlame = "file_blame"
 
 // FeatureFlagIssueFieldsMultiSelect is the feature flag name for the multi-select
-// variant of the custom issue fields write surface. When enabled, issue_write,
-// set_issue_fields, and list_issues accept multi-select inputs
-// (`field_option_names`, `multi_select_option_ids`, and `field_filters[].values`
-// respectively) and their descriptions advertise multi-select. When disabled, the
-// legacy variants of those tools are served, which do not accept multi-select
-// inputs and whose descriptions do not mention multi-select.
-//
-// The flag is intentionally write-surface-only — read paths (list_issue_fields,
-// issue_read, list_issues enrichment) continue to surface multi-select field
-// VALUES for orgs that have dotcom-side multi-select enabled, matching what the
-// dotcom UI already shows.
+// variant of the consolidated issue-fields write tools (issue_write, list_issues).
 const FeatureFlagIssueFieldsMultiSelect = "remote_mcp_issue_fields_multiselect"
 
 // AllowedFeatureFlags is the allowlist of feature flags that can be enabled