diff --git a/base/libgit2/tag.jl b/base/libgit2/tag.jl
index 3c0d31a2b6b52..098bfd03837e9 100644
--- a/base/libgit2/tag.jl
+++ b/base/libgit2/tag.jl
@@ -1,5 +1,10 @@
 # This file is a part of Julia. License is MIT: http://julialang.org/license
 
+"""
+    LibGit2.tag_list(repo::GitRepo) -> Vector{String}
+
+Get a list of all tags in the git repository `repo`.
+"""
 function tag_list(repo::GitRepo)
     sa_ref = Ref(StrArrayStruct())
     @check ccall((:git_tag_list, :libgit2), Cint,
@@ -9,11 +14,27 @@ function tag_list(repo::GitRepo)
     res
 end
 
+"""
+    LibGit2.tag_delete(repo::GitRepo, tag::AbstractString)
+
+Remove the git tag `tag` from the repository `repo`.
+"""
 function tag_delete(repo::GitRepo, tag::AbstractString)
     @check ccall((:git_tag_delete, :libgit2), Cint,
                   (Ptr{Void}, Cstring, ), repo.ptr, tag)
 end
 
+"""
+    LibGit2.tag_create(repo::GitRepo, tag::AbstractString, commit; kwargs...)
+
+Create a new git tag `tag` (e.g. `"v0.5"`) in the repository `repo`, at
+the commit `commit`.
+
+The keyword arguments are:
+  * `msg::AbstractString=""`: the message for the tag.
+  * `force::Bool=false`: if `true`, existing references will be overwritten.
+  * `sig::Signature=Signature(repo)`: the tagger's signature.
+"""
 function tag_create(repo::GitRepo, tag::AbstractString, commit::Union{AbstractString,AbstractGitHash};
                     msg::AbstractString = "",
                     force::Bool = false,
@@ -30,6 +51,11 @@ function tag_create(repo::GitRepo, tag::AbstractString, commit::Union{AbstractSt
     return oid_ptr[]
 end
 
+"""
+    LibGit2.name(tag::GitTag)
+
+The name of `tag` (e.g. `"v0.5"`).
+"""
 function name(tag::GitTag)
     str_ptr = ccall((:git_tag_name, :libgit2), Cstring, (Ptr{Void}, ), tag.ptr)
     str_ptr == C_NULL && throw(Error.GitError(Error.ERROR))